22011012100 has 72 divisors (see below), whose sum is σ = 59549813568. Its totient is φ = 6860572800.

The previous prime is 22011012077. The next prime is 22011012161. The reversal of 22011012100 is 121011022.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1421587 + ... + 1436986.

It is an arithmetic number, because the mean of its divisors is an integer number (827080744).

Almost surely, 2^22011012100 is an apocalyptic number.

22011012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011012100 is an abundant number, since it is smaller than the sum of its proper divisors (37538801468).

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

22011012100 is a wasteful number, since it uses less digits than its factorization.

22011012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858605 (or 2858598 counting only the distinct ones).

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

Adding to 22011012100 its reverse (121011022), we get a palindrome (22132023122).

The spelling of 22011012100 in words is "twenty-two billion, eleven million, twelve thousand, one hundred".