1202021221020 has 96 divisors (see below), whose sum is σ = 3371849026560. Its totient is φ = 319949879040.

The previous prime is 1202021220971. The next prime is 1202021221039. The reversal of 1202021221020 is 201221202021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188135986 + ... + 188142374.

It is an arithmetic number, because the mean of its divisors is an integer number (35123427360).

Almost surely, 2^{1202021221020} is an apocalyptic number.

1202021221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202021221020 is an abundant number, since it is smaller than the sum of its proper divisors (2169827805540).

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

1202021221020 is a wasteful number, since it uses less digits than its factorization.

1202021221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11675 (or 11673 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1202021221020 its reverse (201221202021), we get a palindrome (1403242423041).

The spelling of 1202021221020 in words is "one trillion, two hundred two billion, twenty-one million, two hundred twenty-one thousand, twenty".