312121344140 has 24 divisors (see below), whose sum is σ = 659116589040. Its totient is φ = 124151058368.

The previous prime is 312121344113. The next prime is 312121344163. The reversal of 312121344140 is 41443121213.

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, 43588787 + ... + 43595946.

It is an arithmetic number, because the mean of its divisors is an integer number (27463191210).

Almost surely, 2^312121344140 is an apocalyptic number.

It is an amenable number.

312121344140 is an abundant number, since it is smaller than the sum of its proper divisors (346995244900).

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

312121344140 is a wasteful number, since it uses less digits than its factorization.

312121344140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87184921 (or 87184919 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 312121344140 its reverse (41443121213), we get a palindrome (353564465353).

The spelling of 312121344140 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred forty-four thousand, one hundred forty".