21320000213100 has 36 divisors (see below), whose sum is σ = 61685867284104. Its totient is φ = 5685333390080.

The previous prime is 21320000213063. The next prime is 21320000213107. The reversal of 21320000213100 is 131200002312.

It is a super-2 number, since 2×21320000213100² (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 21320000213100.

It is not an unprimeable number, because it can be changed into a prime (21320000213107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35533333389 + ... + 35533333988.

Almost surely, 2^{21320000213100} is an apocalyptic number.

21320000213100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320000213100 is an abundant number, since it is smaller than the sum of its proper divisors (40365867071004).

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

21320000213100 is a wasteful number, since it uses less digits than its factorization.

21320000213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71066667394 (or 71066667387 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21320000213100 its reverse (131200002312), we get a palindrome (21451200215412).

The spelling of 21320000213100 in words is "twenty-one trillion, three hundred twenty billion, two hundred thirteen thousand, one hundred".