31242121399 has 8 divisors (see below), whose sum is σ = 34220579760. Its totient is φ = 28390406016.

The previous prime is 31242121397. The next prime is 31242121411. The reversal of 31242121399 is 99312124213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31242121399 - 2¹ = 31242121397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242121397) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 31685229 + ... + 31686214.

It is an arithmetic number, because the mean of its divisors is an integer number (4277572470).

Almost surely, 2^31242121399 is an apocalyptic number.

31242121399 is a deficient number, since it is larger than the sum of its proper divisors (2978458361).

31242121399 is a wasteful number, since it uses less digits than its factorization.

31242121399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63371489.

The product of its digits is 23328, while the sum is 37.

The spelling of 31242121399 in words is "thirty-one billion, two hundred forty-two million, one hundred twenty-one thousand, three hundred ninety-nine".