21132122401 has 8 divisors (see below), whose sum is σ = 23286919040. Its totient is φ = 19052932752.

The previous prime is 21132122393. The next prime is 21132122477. The reversal of 21132122401 is 10422123112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21132122401 - 2³ = 21132122393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132122101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18901161 + ... + 18902278.

It is an arithmetic number, because the mean of its divisors is an integer number (2910864880).

Almost surely, 2^21132122401 is an apocalyptic number.

It is an amenable number.

21132122401 is a deficient number, since it is larger than the sum of its proper divisors (2154796639).

21132122401 is a wasteful number, since it uses less digits than its factorization.

21132122401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37803495.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21132122401 its reverse (10422123112), we get a palindrome (31554245513).

The spelling of 21132122401 in words is "twenty-one billion, one hundred thirty-two million, one hundred twenty-two thousand, four hundred one".