131233120221 has 16 divisors (see below), whose sum is σ = 201201119744. Its totient is φ = 74530288944.

The previous prime is 131233120211. The next prime is 131233120231. The reversal of 131233120221 is 122021332131.

It is an interprime number because it is at equal distance from previous prime (131233120211) and next prime (131233120231).

It is not a de Polignac number, because 131233120221 - 2¹⁰ = 131233119197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131233120211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19165891 + ... + 19172736.

It is an arithmetic number, because the mean of its divisors is an integer number (12575069984).

Almost surely, 2^131233120221 is an apocalyptic number.

It is an amenable number.

131233120221 is a deficient number, since it is larger than the sum of its proper divisors (69967999523).

131233120221 is a wasteful number, since it uses less digits than its factorization.

131233120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38338800.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131233120221 its reverse (122021332131), we get a palindrome (253254452352).

The spelling of 131233120221 in words is "one hundred thirty-one billion, two hundred thirty-three million, one hundred twenty thousand, two hundred twenty-one".