20011110102 has 20 divisors (see below), whose sum is σ = 44839710036. Its totient is φ = 6670369980.

The previous prime is 20011110101. The next prime is 20011110107. The reversal of 20011110102 is 20101111002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011110101) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61762524 + ... + 61762847.

Almost surely, 2^20011110102 is an apocalyptic number.

20011110102 is an abundant number, since it is smaller than the sum of its proper divisors (24828599934).

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

20011110102 is a wasteful number, since it uses less digits than its factorization.

20011110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123525385 (or 123525376 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20011110102 its reverse (20101111002), we get a palindrome (40112221104).

The spelling of 20011110102 in words is "twenty billion, eleven million, one hundred ten thousand, one hundred two".