21111311300 has 36 divisors (see below), whose sum is σ = 47803357056. Its totient is φ = 8077370400.

The previous prime is 21111311269. The next prime is 21111311329. The reversal of 21111311300 is 311311112.

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, 4587116 + ... + 4591715.

Almost surely, 2^21111311300 is an apocalyptic number.

21111311300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111311300 is an abundant number, since it is smaller than the sum of its proper divisors (26692045756).

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

21111311300 is a wasteful number, since it uses less digits than its factorization.

21111311300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178868 (or 9178861 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21111311300 its reverse (311311112), we get a palindrome (21422622412).

The spelling of 21111311300 in words is "twenty-one billion, one hundred eleven million, three hundred eleven thousand, three hundred".