20102211100 has 36 divisors (see below), whose sum is σ = 43645519008. Its totient is φ = 8036512000.

The previous prime is 20102211089. The next prime is 20102211127. The reversal of 20102211100 is 111220102.

It is a super-2 number, since 2×20102211100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133380 + ... + 240820.

It is an arithmetic number, because the mean of its divisors is an integer number (1212375528).

Almost surely, 2^20102211100 is an apocalyptic number.

20102211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102211100 is an abundant number, since it is smaller than the sum of its proper divisors (23543307908).

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

20102211100 is a wasteful number, since it uses less digits than its factorization.

20102211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109326 (or 109319 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20102211100 its reverse (111220102), we get a palindrome (20213431202).

The spelling of 20102211100 in words is "twenty billion, one hundred two million, two hundred eleven thousand, one hundred".