21213543315104 has 24 divisors (see below), whose sum is σ = 47730472459488. Its totient is φ = 9091518563520.

The previous prime is 21213543315073. The next prime is 21213543315143. The reversal of 21213543315104 is 40151334531212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47351658962 + ... + 47351659409.

It is an arithmetic number, because the mean of its divisors is an integer number (1988769685812).

Almost surely, 2^{21213543315104} is an apocalyptic number.

It is an amenable number.

21213543315104 is an abundant number, since it is smaller than the sum of its proper divisors (26516929144384).

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

21213543315104 is an equidigital number, since it uses as much as digits as its factorization.

21213543315104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94703318388 (or 94703318380 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 21213543315104 its reverse (40151334531212), we get a palindrome (61364877846316).

The spelling of 21213543315104 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, one hundred four".