21211252315000 has 80 divisors (see below), whose sum is σ = 54215961057720. Its totient is φ = 7713182640000.

The previous prime is 21211252314961. The next prime is 21211252315031. The reversal of 21211252315000 is 51325211212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192774567 + ... + 192884566.

Almost surely, 2^{21211252315000} is an apocalyptic number.

21211252315000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211252315000 is an abundant number, since it is smaller than the sum of its proper divisors (33004708742720).

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

21211252315000 is a wasteful number, since it uses less digits than its factorization.

21211252315000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385659170 (or 385659151 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21211252315000 its reverse (51325211212), we get a palindrome (21262577526212).

The spelling of 21211252315000 in words is "twenty-one trillion, two hundred eleven billion, two hundred fifty-two million, three hundred fifteen thousand".