131201123210 has 64 divisors (see below), whose sum is σ = 251116798752. Its totient is φ = 49183850496.

The previous prime is 131201123177. The next prime is 131201123213. The reversal of 131201123210 is 12321102131.

It can be written as a sum of positive squares in 16 ways, for example, as 22941040369 + 108260082841 = 151463^2 + 329029^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (131201123213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65829974 + ... + 65831966.

Almost surely, 2^131201123210 is an apocalyptic number.

131201123210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131201123210 is a deficient number, since it is larger than the sum of its proper divisors (119915675542).

131201123210 is a wasteful number, since it uses less digits than its factorization.

131201123210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131201123210 its reverse (12321102131), we get a palindrome (143522225341).

The spelling of 131201123210 in words is "one hundred thirty-one billion, two hundred one million, one hundred twenty-three thousand, two hundred ten".