121021202112020 has 48 divisors (see below), whose sum is σ = 290452218268800. Its totient is φ = 41492793124224.

The previous prime is 121021202111941. The next prime is 121021202112023. The reversal of 121021202112020 is 20211202120121.

It is a super-2 number, since 2×121021202112020² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121021202112020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021202112023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30520607 + ... + 34257113.

It is an arithmetic number, because the mean of its divisors is an integer number (6051087880600).

Almost surely, 2^{121021202112020} is an apocalyptic number.

121021202112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021202112020 is an abundant number, since it is smaller than the sum of its proper divisors (169431016156780).

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

121021202112020 is a wasteful number, since it uses less digits than its factorization.

121021202112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967872 (or 3967870 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121021202112020 its reverse (20211202120121), we get a palindrome (141232404232141).

The spelling of 121021202112020 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred two million, one hundred twelve thousand, twenty".