5123153500021 has 4 divisors (see below), whose sum is σ = 5124617680000. Its totient is φ = 5121689320044.

The previous prime is 5123153500001. The next prime is 5123153500067. The reversal of 5123153500021 is 1200053513215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5123153500021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5123153500001) 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, 732084741 + ... + 732091738.

It is an arithmetic number, because the mean of its divisors is an integer number (1281154420000).

Almost surely, 2^{5123153500021} is an apocalyptic number.

It is an amenable number.

5123153500021 is a deficient number, since it is larger than the sum of its proper divisors (1464179979).

5123153500021 is a wasteful number, since it uses less digits than its factorization.

5123153500021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464179978.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 5123153500021 in words is "five trillion, one hundred twenty-three billion, one hundred fifty-three million, five hundred thousand, twenty-one".