31412404021 has 4 divisors (see below), whose sum is σ = 31534631532. Its totient is φ = 31290176512.

The previous prime is 31412404003. The next prime is 31412404033. The reversal of 31412404021 is 12040421413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12040421413 = 47 ⋅256179179.

It can be written as a sum of positive squares in 2 ways, for example, as 19615403025 + 11797000996 = 140055^2 + 108614^2 .

It is a cyclic number.

It is not a de Polignac number, because 31412404021 - 2²³ = 31404015413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31412403983 and 31412404001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31412408021) 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 3 ways as a sum of consecutive naturals, for example, 61113370 + ... + 61113883.

It is an arithmetic number, because the mean of its divisors is an integer number (7883657883).

Almost surely, 2^31412404021 is an apocalyptic number.

It is an amenable number.

31412404021 is a deficient number, since it is larger than the sum of its proper divisors (122227511).

31412404021 is a wasteful number, since it uses less digits than its factorization.

31412404021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122227510.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31412404021 its reverse (12040421413), we get a palindrome (43452825434).

The spelling of 31412404021 in words is "thirty-one billion, four hundred twelve million, four hundred four thousand, twenty-one".