131002213221 has 64 divisors (see below), whose sum is σ = 213073920000. Its totient is φ = 78888997440.

The previous prime is 131002213189. The next prime is 131002213229. The reversal of 131002213221 is 122312200131.

It is not a de Polignac number, because 131002213221 - 2⁵ = 131002213189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131002213194 and 131002213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131002213229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75591871 + ... + 75593603.

It is an arithmetic number, because the mean of its divisors is an integer number (3329280000).

Almost surely, 2^131002213221 is an apocalyptic number.

131002213221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131002213221 is a deficient number, since it is larger than the sum of its proper divisors (82071706779).

131002213221 is a wasteful number, since it uses less digits than its factorization.

131002213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231 (or 3225 counting only the distinct ones).

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

Adding to 131002213221 its reverse (122312200131), we get a palindrome (253314413352).

The spelling of 131002213221 in words is "one hundred thirty-one billion, two million, two hundred thirteen thousand, two hundred twenty-one".