1201021210220 has 72 divisors (see below), whose sum is σ = 2731554287280. Its totient is φ = 443376910080.

The previous prime is 1201021210219. The next prime is 1201021210223. The reversal of 1201021210220 is 220121201021.

It is a junction number, because it is equal to n+sod(n) for n = 1201021210195 and 1201021210204.

It is not an unprimeable number, because it can be changed into a prime (1201021210223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21675311 + ... + 21730649.

It is an arithmetic number, because the mean of its divisors is an integer number (37938253990).

Almost surely, 2^{1201021210220} is an apocalyptic number.

1201021210220 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 1201021210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365777143640).

1201021210220 is an abundant number, since it is smaller than the sum of its proper divisors (1530533077060).

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

1201021210220 is a wasteful number, since it uses less digits than its factorization.

1201021210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61795 (or 61780 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201021210220 its reverse (220121201021), we get a palindrome (1421142411241).

The spelling of 1201021210220 in words is "one trillion, two hundred one billion, twenty-one million, two hundred ten thousand, two hundred twenty".