20102221100 has 36 divisors (see below), whose sum is σ = 46977347424. Its totient is φ = 7422358080.

The previous prime is 20102221001. The next prime is 20102221159. The reversal of 20102221100 is 112220102.

It is a happy 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, 7730324 + ... + 7732923.

Almost surely, 2^20102221100 is an apocalyptic number.

20102221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102221100 is an abundant number, since it is smaller than the sum of its proper divisors (26875126324).

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

20102221100 is a wasteful number, since it uses less digits than its factorization.

20102221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463274 (or 15463267 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20102221100 its reverse (112220102), we get a palindrome (20214441202).

The spelling of 20102221100 in words is "twenty billion, one hundred two million, two hundred twenty-one thousand, one hundred".