121021220222020 has 24 divisors (see below), whose sum is σ = 254144987417664. Its totient is φ = 48408407145696.

The previous prime is 121021220222017. The next prime is 121021220222027. The reversal of 121021220222020 is 20222022120121.

It is a super-2 number, since 2×121021220222020² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121021220222027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8026759 + ... + 17506321.

It is an arithmetic number, because the mean of its divisors is an integer number (10589374475736).

Almost surely, 2^{121021220222020} is an apocalyptic number.

121021220222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021220222020 is an abundant number, since it is smaller than the sum of its proper divisors (133123767195644).

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

121021220222020 is a wasteful number, since it uses less digits than its factorization.

121021220222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117899 (or 10117897 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121021220222020 its reverse (20222022120121), we get a palindrome (141243242342141).

The spelling of 121021220222020 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, twenty".