3121202312135 has 4 divisors (see below), whose sum is σ = 3745442774568. Its totient is φ = 2496961849704.

The previous prime is 3121202312117. The next prime is 3121202312171. The reversal of 3121202312135 is 5312132021213.

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

It is a cyclic number.

It is not a de Polignac number, because 3121202312135 - 2⁸ = 3121202311879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312120231209 + ... + 312120231218.

It is an arithmetic number, because the mean of its divisors is an integer number (936360693642).

Almost surely, 2^{3121202312135} is an apocalyptic number.

3121202312135 is a deficient number, since it is larger than the sum of its proper divisors (624240462433).

3121202312135 is an equidigital number, since it uses as much as digits as its factorization.

3121202312135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624240462432.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 3121202312135 its reverse (5312132021213), we get a palindrome (8433334333348).

The spelling of 3121202312135 in words is "three trillion, one hundred twenty-one billion, two hundred two million, three hundred twelve thousand, one hundred thirty-five".