21153012013412 has 12 divisors (see below), whose sum is σ = 37020046773360. Its totient is φ = 10575855792456.

The previous prime is 21153012013403. The next prime is 21153012013417. The reversal of 21153012013412 is 21431021035112.

It is not an unprimeable number, because it can be changed into a prime (21153012013417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162480362 + ... + 162610497.

It is an arithmetic number, because the mean of its divisors is an integer number (3085003897780).

Almost surely, 2^{21153012013412} is an apocalyptic number.

It is an amenable number.

21153012013412 is a deficient number, since it is larger than the sum of its proper divisors (15867034759948).

21153012013412 is a wasteful number, since it uses less digits than its factorization.

21153012013412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325107130 (or 325107128 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21153012013412 its reverse (21431021035112), we get a palindrome (42584033048524).

The spelling of 21153012013412 in words is "twenty-one trillion, one hundred fifty-three billion, twelve million, thirteen thousand, four hundred twelve".