31402421213 has 4 divisors (see below), whose sum is σ = 31404447360. Its totient is φ = 31400395068.

The previous prime is 31402421201. The next prime is 31402421231. The reversal of 31402421213 is 31212420413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31212420413 = 12809 ⋅2436757.

It is a cyclic number.

It is not a de Polignac number, because 31402421213 - 2¹² = 31402417117 is a prime.

It is a super-2 number, since 2×31402421213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402421243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989645 + ... + 1020882.

It is an arithmetic number, because the mean of its divisors is an integer number (7851111840).

Almost surely, 2^31402421213 is an apocalyptic number.

It is an amenable number.

31402421213 is a deficient number, since it is larger than the sum of its proper divisors (2026147).

31402421213 is a wasteful number, since it uses less digits than its factorization.

31402421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026146.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31402421213 its reverse (31212420413), we get a palindrome (62614841626).

The spelling of 31402421213 in words is "thirty-one billion, four hundred two million, four hundred twenty-one thousand, two hundred thirteen".