131222131121 has 8 divisors (see below), whose sum is σ = 132639481344. Its totient is φ = 129807097200.

The previous prime is 131222131093. The next prime is 131222131123. The reversal of 131222131121 is 121131222131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131222131121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131222131093 and 131222131102.

It is not an unprimeable number, because it can be changed into a prime (131222131123) 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, 465041 + ... + 691886.

It is an arithmetic number, because the mean of its divisors is an integer number (16579935168).

Almost surely, 2^131222131121 is an apocalyptic number.

It is an amenable number.

131222131121 is a deficient number, since it is larger than the sum of its proper divisors (1417350223).

131222131121 is a wasteful number, since it uses less digits than its factorization.

131222131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158151.

The product of its digits is 144, while the sum is 20.

Adding to 131222131121 its reverse (121131222131), we get a palindrome (252353353252).

It can be divided in two parts, 131222131 and 121, that multiplied together give a palindrome (15877877851).

The spelling of 131222131121 in words is "one hundred thirty-one billion, two hundred twenty-two million, one hundred thirty-one thousand, one hundred twenty-one".