312240121202 has 4 divisors (see below), whose sum is σ = 468360181806. Its totient is φ = 156120060600.

The previous prime is 312240121187. The next prime is 312240121213. The reversal of 312240121202 is 202121042213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202121042213 = 38431 ⋅5259323.

It can be written as a sum of positive squares in only one way, i.e., 200309058481 + 111931062721 = 447559^2 + 334561^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78060030299 + ... + 78060030302.

Almost surely, 2^312240121202 is an apocalyptic number.

312240121202 is a deficient number, since it is larger than the sum of its proper divisors (156120060604).

312240121202 is a wasteful number, since it uses less digits than its factorization.

312240121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156120060603.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 312240121202 its reverse (202121042213), we get a palindrome (514361163415).

The spelling of 312240121202 in words is "three hundred twelve billion, two hundred forty million, one hundred twenty-one thousand, two hundred two".