131122233111221 has 48 divisors (see below), whose sum is σ = 146339914896000. Its totient is φ = 117375391056000.

The previous prime is 131122233111203. The next prime is 131122233111281. The reversal of 131122233111221 is 122111332221131.

It is a de Polignac number, because none of the positive numbers 2^k-131122233111221 is a prime.

It is a super-2 number, since 2×131122233111221² (a number of 29 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 (131122233111281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40708546391 + ... + 40708549611.

It is an arithmetic number, because the mean of its divisors is an integer number (3048748227000).

Almost surely, 2^{131122233111221} is an apocalyptic number.

131122233111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131122233111221 is a deficient number, since it is larger than the sum of its proper divisors (15217681784779).

131122233111221 is a wasteful number, since it uses less digits than its factorization.

131122233111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7802 (or 7791 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

Adding to 131122233111221 its reverse (122111332221131), we get a palindrome (253233565332352).

It can be divided in two parts, 1311222 and 33111221, that added together give a palindrome (34422443).

The spelling of 131122233111221 in words is "one hundred thirty-one trillion, one hundred twenty-two billion, two hundred thirty-three million, one hundred eleven thousand, two hundred twenty-one".