20103232121 has 16 divisors (see below), whose sum is σ = 23480346624. Its totient is φ = 16852936464.

The previous prime is 20103232111. The next prime is 20103232181. The reversal of 20103232121 is 12123230102.

It is not a de Polignac number, because 20103232121 - 2⁶ = 20103232057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20103232121.

It is not an unprimeable number, because it can be changed into a prime (20103232111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467306 + ... + 508508.

It is an arithmetic number, because the mean of its divisors is an integer number (1467521664).

Almost surely, 2^20103232121 is an apocalyptic number.

It is an amenable number.

20103232121 is a deficient number, since it is larger than the sum of its proper divisors (3377114503).

20103232121 is a wasteful number, since it uses less digits than its factorization.

20103232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42740.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20103232121 its reverse (12123230102), we get a palindrome (32226462223).

The spelling of 20103232121 in words is "twenty billion, one hundred three million, two hundred thirty-two thousand, one hundred twenty-one".