20102112111021 has 8 divisors (see below), whose sum is σ = 26812217357664. Its totient is φ = 13396707469200.

The previous prime is 20102112111019. The next prime is 20102112111023. The reversal of 20102112111021 is 12011121120102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20102112111019) and next prime (20102112111023).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102112111021 - 2¹ = 20102112111019 is a prime.

It is a super-2 number, since 2×20102112111021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102112111023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175141226 + ... + 1175158331.

It is an arithmetic number, because the mean of its divisors is an integer number (3351527169708).

Almost surely, 2^{20102112111021} is an apocalyptic number.

It is an amenable number.

20102112111021 is a deficient number, since it is larger than the sum of its proper divisors (6710105246643).

20102112111021 is a wasteful number, since it uses less digits than its factorization.

20102112111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350302411.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20102112111021 its reverse (12011121120102), we get a palindrome (32113233231123).

The spelling of 20102112111021 in words is "twenty trillion, one hundred two billion, one hundred twelve million, one hundred eleven thousand, twenty-one".