21122002121100 has 36 divisors (see below), whose sum is σ = 61112992804584. Its totient is φ = 5632533898880.

The previous prime is 21122002121047. The next prime is 21122002121113. The reversal of 21122002121100 is 112120022112.

It is a super-2 number, since 2×21122002121100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21122002121100.

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, 35203336569 + ... + 35203337168.

Almost surely, 2^{21122002121100} is an apocalyptic number.

21122002121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122002121100 is an abundant number, since it is smaller than the sum of its proper divisors (39990990683484).

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

21122002121100 is a wasteful number, since it uses less digits than its factorization.

21122002121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70406673754 (or 70406673747 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122002121100 its reverse (112120022112), we get a palindrome (21234122143212).

The spelling of 21122002121100 in words is "twenty-one trillion, one hundred twenty-two billion, two million, one hundred twenty-one thousand, one hundred".