21201151005 has 24 divisors (see below), whose sum is σ = 38109725472. Its totient is φ = 11307279888.

The previous prime is 21201150973. The next prime is 21201151043. The reversal of 21201151005 is 50015110212.

It is not a de Polignac number, because 21201151005 - 2⁵ = 21201150973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8723539 + ... + 8725968.

It is an arithmetic number, because the mean of its divisors is an integer number (1587905228).

Almost surely, 2^21201151005 is an apocalyptic number.

It is an amenable number.

21201151005 is a deficient number, since it is larger than the sum of its proper divisors (16908574467).

21201151005 is an equidigital number, since it uses as much as digits as its factorization.

21201151005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17449527 (or 17449515 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

Adding to 21201151005 its reverse (50015110212), we get a palindrome (71216261217).

The spelling of 21201151005 in words is "twenty-one billion, two hundred one million, one hundred fifty-one thousand, five".