21100311152 has 20 divisors (see below), whose sum is σ = 40884514920. Its totient is φ = 10549468608.

The previous prime is 21100311137. The next prime is 21100311163. The reversal of 21100311152 is 25111300112.

It is a super-2 number, since 2×21100311152² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21100311152.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 287543 + ... + 353385.

It is an arithmetic number, because the mean of its divisors is an integer number (2044225746).

Almost surely, 2^21100311152 is an apocalyptic number.

It is an amenable number.

21100311152 is a deficient number, since it is larger than the sum of its proper divisors (19784203768).

21100311152 is a wasteful number, since it uses less digits than its factorization.

21100311152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85880 (or 85874 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 21100311152 its reverse (25111300112), we get a palindrome (46211611264).

The spelling of 21100311152 in words is "twenty-one billion, one hundred million, three hundred eleven thousand, one hundred fifty-two".