131022013221 has 48 divisors (see below), whose sum is σ = 211259161152. Its totient is φ = 77573932800.

The previous prime is 131022013193. The next prime is 131022013231. The reversal of 131022013221 is 122310220131.

131022013221 is a `hidden beast` number, since 1 + 310 + 220 + 132 + 2 + 1 = 666.

It is not a de Polignac number, because 131022013221 - 2¹⁷ = 131021882149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131022013194 and 131022013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022013231) 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, 1168966 + ... + 1276136.

It is an arithmetic number, because the mean of its divisors is an integer number (4401232524).

Almost surely, 2^131022013221 is an apocalyptic number.

131022013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131022013221 is a deficient number, since it is larger than the sum of its proper divisors (80237147931).

131022013221 is a wasteful number, since it uses less digits than its factorization.

131022013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107474 (or 107471 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131022013221 its reverse (122310220131), we get a palindrome (253332233352).

The spelling of 131022013221 in words is "one hundred thirty-one billion, twenty-two million, thirteen thousand, two hundred twenty-one".