13220101231 has 4 divisors (see below), whose sum is σ = 13436824264. Its totient is φ = 13003378200.

The previous prime is 13220101217. The next prime is 13220101277. The reversal of 13220101231 is 13210102231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13220101231 - 2²³ = 13211712623 is a prime.

It is a super-2 number, since 2×13220101231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220104231) 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, 108361425 + ... + 108361546.

It is an arithmetic number, because the mean of its divisors is an integer number (3359206066).

Almost surely, 2^13220101231 is an apocalyptic number.

13220101231 is a deficient number, since it is larger than the sum of its proper divisors (216723033).

13220101231 is an equidigital number, since it uses as much as digits as its factorization.

13220101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216723032.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13220101231 its reverse (13210102231), we get a palindrome (26430203462).

The spelling of 13220101231 in words is "thirteen billion, two hundred twenty million, one hundred one thousand, two hundred thirty-one".