131212330 has 16 divisors (see below), whose sum is σ = 237490344. Its totient is φ = 52194240.

The previous prime is 131212321. The next prime is 131212343. The reversal of 131212330 is 33212131.

It can be written as a sum of positive squares in 4 ways, for example, as 76615009 + 54597321 = 8753^2 + 7389^2 .

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, 34437 + ... + 38056.

Almost surely, 2^131212330 is an apocalyptic number.

131212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131212330 is a deficient number, since it is larger than the sum of its proper divisors (106278014).

131212330 is a wasteful number, since it uses less digits than its factorization.

131212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72681.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131212330 is about 11454.7950658229. The cubic root of 131212330 is about 508.1495545162.

Adding to 131212330 its reverse (33212131), we get a palindrome (164424461).

It can be divided in two parts, 13121 and 2330, that added together give a palindrome (15451).

The spelling of 131212330 in words is "one hundred thirty-one million, two hundred twelve thousand, three hundred thirty".