21013151200 has 36 divisors (see below), whose sum is σ = 51298357320. Its totient is φ = 8405260160.

The previous prime is 21013151161. The next prime is 21013151221. The reversal of 21013151200 is 215131012.

It is a super-2 number, since 2×21013151200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13132420 + ... + 13134019.

It is an arithmetic number, because the mean of its divisors is an integer number (1424954370).

Almost surely, 2^21013151200 is an apocalyptic number.

21013151200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013151200 is an abundant number, since it is smaller than the sum of its proper divisors (30285206120).

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

21013151200 is a wasteful number, since it uses less digits than its factorization.

21013151200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26266459 (or 26266446 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 21013151200 its reverse (215131012), we get a palindrome (21228282212).

The spelling of 21013151200 in words is "twenty-one billion, thirteen million, one hundred fifty-one thousand, two hundred".