131221270 has 8 divisors (see below), whose sum is σ = 236198304. Its totient is φ = 52488504.

The previous prime is 131221267. The next prime is 131221289. The reversal of 131221270 is 72122131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6561054 + ... + 6561073.

It is an arithmetic number, because the mean of its divisors is an integer number (29524788).

Almost surely, 2^131221270 is an apocalyptic number.

131221270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221270 is a deficient number, since it is larger than the sum of its proper divisors (104977034).

131221270 is a wasteful number, since it uses less digits than its factorization.

131221270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13122134.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 131221270 is about 11455.1852887677. The cubic root of 131221270 is about 508.1610949811.

The spelling of 131221270 in words is "one hundred thirty-one million, two hundred twenty-one thousand, two hundred seventy".