21210224310312 has 32 divisors (see below), whose sum is σ = 53115893964000. Its totient is φ = 7058030345024.

The previous prime is 21210224310281. The next prime is 21210224310313. The reversal of 21210224310312 is 21301342201212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21210224310313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752762187 + ... + 752790362.

It is an arithmetic number, because the mean of its divisors is an integer number (1659871686375).

Almost surely, 2^{21210224310312} is an apocalyptic number.

It is an amenable number.

21210224310312 is an abundant number, since it is smaller than the sum of its proper divisors (31905669653688).

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

21210224310312 is a wasteful number, since it uses less digits than its factorization.

21210224310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505553145 (or 1505553141 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21210224310312 its reverse (21301342201212), we get a palindrome (42511566511524).

The spelling of 21210224310312 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-four million, three hundred ten thousand, three hundred twelve".