312131101120402 has 4 divisors (see below), whose sum is σ = 468196651680606. Its totient is φ = 156065550560200.

The previous prime is 312131101120369. The next prime is 312131101120429. The reversal of 312131101120402 is 204021101131213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 270023473976881 + 42107627143521 = 16432391^2 + 6489039^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78032775280099 + ... + 78032775280102.

Almost surely, 2^{312131101120402} is an apocalyptic number.

312131101120402 is a deficient number, since it is larger than the sum of its proper divisors (156065550560204).

312131101120402 is a wasteful number, since it uses less digits than its factorization.

312131101120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156065550560203.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 312131101120402 its reverse (204021101131213), we get a palindrome (516152202251615).

The spelling of 312131101120402 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred one million, one hundred twenty thousand, four hundred two".