20020102121020 has 24 divisors (see below), whose sum is σ = 42046566605568. Its totient is φ = 8007211867200.

The previous prime is 20020102120961. The next prime is 20020102121147. The reversal of 20020102121020 is 2012120102002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51613276 + ... + 51999715.

It is an arithmetic number, because the mean of its divisors is an integer number (1751940275232).

Almost surely, 2^{20020102121020} is an apocalyptic number.

20020102121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020102121020 is an abundant number, since it is smaller than the sum of its proper divisors (22026464484548).

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

20020102121020 is a wasteful number, since it uses less digits than its factorization.

20020102121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103622661 (or 103622659 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20020102121020 its reverse (2012120102002), we get a palindrome (22032222223022).

The spelling of 20020102121020 in words is "twenty trillion, twenty billion, one hundred two million, one hundred twenty-one thousand, twenty".