131220222232 has 32 divisors (see below), whose sum is σ = 269027827200. Its totient is φ = 59507149600.

The previous prime is 131220222227. The next prime is 131220222247. The reversal of 131220222232 is 232222022131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691932 + ... + 1767787.

It is an arithmetic number, because the mean of its divisors is an integer number (8407119600).

Almost surely, 2^131220222232 is an apocalyptic number.

It is an amenable number.

131220222232 is an abundant number, since it is smaller than the sum of its proper divisors (137807604968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131220222232 is a wasteful number, since it uses less digits than its factorization.

131220222232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460167 (or 3460163 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 131220222232 its reverse (232222022131), we get a palindrome (363442244363).

The spelling of 131220222232 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred thirty-two".