21311213000100 has 72 divisors (see below), whose sum is σ = 61783028758080. Its totient is φ = 5671691902080.

The previous prime is 21311213000039. The next prime is 21311213000137. The reversal of 21311213000100 is 100031211312.

It is a happy number.

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 21311213000100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70462795 + ... + 70764594.

It is an arithmetic number, because the mean of its divisors is an integer number (858097621640).

Almost surely, 2^{21311213000100} is an apocalyptic number.

21311213000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311213000100 is an abundant number, since it is smaller than the sum of its proper divisors (40471815757980).

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

21311213000100 is a wasteful number, since it uses less digits than its factorization.

21311213000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141227909 (or 141227902 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21311213000100 its reverse (100031211312), we get a palindrome (21411244211412).

The spelling of 21311213000100 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirteen million, one hundred", and thus it is an aban number.