131231222101 has 32 divisors (see below), whose sum is σ = 160059939840. Its totient is φ = 105030571776.

The previous prime is 131231222071. The next prime is 131231222117. The reversal of 131231222101 is 101222132131.

It is not a de Polignac number, because 131231222101 - 2⁵ = 131231222069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231222201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9429390 + ... + 9443296.

It is an arithmetic number, because the mean of its divisors is an integer number (5001873120).

Almost surely, 2^131231222101 is an apocalyptic number.

It is an amenable number.

131231222101 is a deficient number, since it is larger than the sum of its proper divisors (28828717739).

131231222101 is a wasteful number, since it uses less digits than its factorization.

131231222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14553.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131231222101 its reverse (101222132131), we get a palindrome (232453354232).

The spelling of 131231222101 in words is "one hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, one hundred one".