20121021012102 has 16 divisors (see below), whose sum is σ = 40269104612352. Its totient is φ = 6702496572680.

The previous prime is 20121021012041. The next prime is 20121021012139. The reversal of 20121021012102 is 20121012012102.

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, 1127598174 + ... + 1127616017.

It is an arithmetic number, because the mean of its divisors is an integer number (2516819038272).

Almost surely, 2^{20121021012102} is an apocalyptic number.

20121021012102 is an abundant number, since it is smaller than the sum of its proper divisors (20148083600250).

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

20121021012102 is a wasteful number, since it uses less digits than its factorization.

20121021012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255215683.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121021012102 its reverse (20121012012102), we get a palindrome (40242033024204).

Subtracting from 20121021012102 its reverse (20121012012102), we obtain a square (9000000 = 3000²).

The spelling of 20121021012102 in words is "twenty trillion, one hundred twenty-one billion, twenty-one million, twelve thousand, one hundred two".