131222201231 has 16 divisors (see below), whose sum is σ = 149395276800. Its totient is φ = 114091132320.

The previous prime is 131222201203. The next prime is 131222201251. The reversal of 131222201231 is 132102222131.

It is not a de Polignac number, because 131222201231 - 2⁶ = 131222201167 is a prime.

It is a super-2 number, since 2×131222201231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222201251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151545 + ... + 2211693.

It is an arithmetic number, because the mean of its divisors is an integer number (9337204800).

Almost surely, 2^131222201231 is an apocalyptic number.

131222201231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131222201231 is a deficient number, since it is larger than the sum of its proper divisors (18173075569).

131222201231 is a wasteful number, since it uses less digits than its factorization.

131222201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131222201231 its reverse (132102222131), we get a palindrome (263324423362).

The spelling of 131222201231 in words is "one hundred thirty-one billion, two hundred twenty-two million, two hundred one thousand, two hundred thirty-one".