1202221020 has 384 divisors, whose sum is σ = 4650412032. Its totient is φ = 223948800.

The previous prime is 1202221019. The next prime is 1202221021. The reversal of 1202221020 is 201222021.

It is an interprime number because it is at equal distance from previous prime (1202221019) and next prime (1202221021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1202220987 and 1202221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202221021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2221950 + ... + 2222490.

It is an arithmetic number, because the mean of its divisors is an integer number (12110448).

Almost surely, 2^1202221020 is an apocalyptic number.

1202221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325206016).

1202221020 is an abundant number, since it is smaller than the sum of its proper divisors (3448191012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1202221020 is a wasteful number, since it uses less digits than its factorization.

1202221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1202221020 is about 34673.0589939797. The cubic root of 1202221020 is about 1063.3137723254.

Adding to 1202221020 its reverse (201222021), we get a palindrome (1403443041).

It can be divided in two parts, 1202 and 221020, that added together give a palindrome (222222).

The spelling of 1202221020 in words is "one billion, two hundred two million, two hundred twenty-one thousand, twenty".