21153025100344 has 64 divisors (see below), whose sum is σ = 40253423616000. Its totient is φ = 10419133628160.

The previous prime is 21153025100287. The next prime is 21153025100351. The reversal of 21153025100344 is 44300152035112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2508953809 + ... + 2508962239.

It is an arithmetic number, because the mean of its divisors is an integer number (628959744000).

Almost surely, 2^{21153025100344} is an apocalyptic number.

It is an amenable number.

21153025100344 is a deficient number, since it is larger than the sum of its proper divisors (19100398515656).

21153025100344 is a wasteful number, since it uses less digits than its factorization.

21153025100344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13148 (or 13144 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 21153025100344 its reverse (44300152035112), we get a palindrome (65453177135456).

The spelling of 21153025100344 in words is "twenty-one trillion, one hundred fifty-three billion, twenty-five million, one hundred thousand, three hundred forty-four".