312234240021 has 16 divisors (see below), whose sum is σ = 457734955008. Its totient is φ = 187742847600.

The previous prime is 312234239927. The next prime is 312234240049. The reversal of 312234240021 is 120042432213.

It is a happy number.

It is not a de Polignac number, because 312234240021 - 2¹⁵ = 312234207253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312234239973 and 312234240000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312234240061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37246375 + ... + 37254756.

It is an arithmetic number, because the mean of its divisors is an integer number (28608434688).

Almost surely, 2^312234240021 is an apocalyptic number.

It is an amenable number.

312234240021 is a deficient number, since it is larger than the sum of its proper divisors (145500714987).

312234240021 is a wasteful number, since it uses less digits than its factorization.

312234240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74501272.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 312234240021 its reverse (120042432213), we get a palindrome (432276672234).

It can be divided in two parts, 312234 and 240021, that added together give a palindrome (552255).

The spelling of 312234240021 in words is "three hundred twelve billion, two hundred thirty-four million, two hundred forty thousand, twenty-one".