20102122110021 has 32 divisors (see below), whose sum is σ = 31020113141760. Its totient is φ = 11341316697984.

The previous prime is 20102122110011. The next prime is 20102122110029. The reversal of 20102122110021 is 12001122120102.

It is not a de Polignac number, because 20102122110021 - 2⁵ = 20102122109989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102122110029) 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, 180033616 + ... + 180145238.

It is an arithmetic number, because the mean of its divisors is an integer number (969378535680).

Almost surely, 2^{20102122110021} is an apocalyptic number.

20102122110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20102122110021 is a deficient number, since it is larger than the sum of its proper divisors (10917991031739).

20102122110021 is a wasteful number, since it uses less digits than its factorization.

20102122110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220265.

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

Adding to 20102122110021 its reverse (12001122120102), we get a palindrome (32103244230123).

The spelling of 20102122110021 in words is "twenty trillion, one hundred two billion, one hundred twenty-two million, one hundred ten thousand, twenty-one".