20112010100021 has 32 divisors (see below), whose sum is σ = 23450350694400. Its totient is φ = 16891943218560.

The previous prime is 20112010100003. The next prime is 20112010100057. The reversal of 20112010100021 is 12000101021102.

It is a cyclic number.

It is not a de Polignac number, because 20112010100021 - 2³⁰ = 20110936358197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112010099975 and 20112010100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112010100621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168001016 + ... + 168120686.

It is an arithmetic number, because the mean of its divisors is an integer number (732823459200).

Almost surely, 2^{20112010100021} is an apocalyptic number.

It is an amenable number.

20112010100021 is a deficient number, since it is larger than the sum of its proper divisors (3338340594379).

20112010100021 is a wasteful number, since it uses less digits than its factorization.

20112010100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121049.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20112010100021 its reverse (12000101021102), we get a palindrome (32112111121123).

The spelling of 20112010100021 in words is "twenty trillion, one hundred twelve billion, ten million, one hundred thousand, twenty-one".