31412312021 has 4 divisors (see below), whose sum is σ = 31418101344. Its totient is φ = 31406522700.

The previous prime is 31412311993. The next prime is 31412312023. The reversal of 31412312021 is 12021321413.

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.

It is a cyclic number.

It is not a de Polignac number, because 31412312021 - 2¹⁰ = 31412310997 is a prime.

It is a super-2 number, since 2×31412312021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31412311984 and 31412312002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31412312023) 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, 2886515 + ... + 2897376.

It is an arithmetic number, because the mean of its divisors is an integer number (7854525336).

Almost surely, 2^31412312021 is an apocalyptic number.

It is an amenable number.

31412312021 is a deficient number, since it is larger than the sum of its proper divisors (5789323).

31412312021 is an equidigital number, since it uses as much as digits as its factorization.

31412312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789322.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31412312021 its reverse (12021321413), we get a palindrome (43433633434).

The spelling of 31412312021 in words is "thirty-one billion, four hundred twelve million, three hundred twelve thousand, twenty-one".