312121433130 has 64 divisors (see below), whose sum is σ = 809781477120. Its totient is φ = 76537737216.

The previous prime is 312121433081. The next prime is 312121433159. The reversal of 312121433130 is 31334121213.

It is a self number, because there is not a number n which added to its sum of digits gives 312121433130.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1418935 + ... + 1624074.

It is an arithmetic number, because the mean of its divisors is an integer number (12652835580).

Almost surely, 2^312121433130 is an apocalyptic number.

312121433130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312121433130 is an abundant number, since it is smaller than the sum of its proper divisors (497660043990).

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

312121433130 is a wasteful number, since it uses less digits than its factorization.

312121433130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043295.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 312121433130 its reverse (31334121213), we get a palindrome (343455554343).

The spelling of 312121433130 in words is "three hundred twelve billion, one hundred twenty-one million, four hundred thirty-three thousand, one hundred thirty".