21533152365124 has 12 divisors (see below), whose sum is σ = 37683051179200. Its totient is φ = 10766566313928.

The previous prime is 21533152365083. The next prime is 21533152365139. The reversal of 21533152365124 is 42156325133512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4860457 + ... + 8166415.

Almost surely, 2^{21533152365124} is an apocalyptic number.

It is an amenable number.

21533152365124 is a deficient number, since it is larger than the sum of its proper divisors (16149898814076).

21533152365124 is a wasteful number, since it uses less digits than its factorization.

21533152365124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934322 (or 4934320 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

Adding to 21533152365124 its reverse (42156325133512), we get a palindrome (63689477498636).

The spelling of 21533152365124 in words is "twenty-one trillion, five hundred thirty-three billion, one hundred fifty-two million, three hundred sixty-five thousand, one hundred twenty-four".