212431003021 has 4 divisors (see below), whose sum is σ = 212767661344. Its totient is φ = 212094344700.

The previous prime is 212431003013. The next prime is 212431003051. The reversal of 212431003021 is 120300134212.

It is a happy number.

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 212431003021 - 2³ = 212431003013 is a prime.

It is a super-2 number, since 2×212431003021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212431003021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212431003051) 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, 168328215 + ... + 168329476.

It is an arithmetic number, because the mean of its divisors is an integer number (53191915336).

Almost surely, 2^212431003021 is an apocalyptic number.

It is an amenable number.

212431003021 is a deficient number, since it is larger than the sum of its proper divisors (336658323).

212431003021 is an equidigital number, since it uses as much as digits as its factorization.

212431003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336658322.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212431003021 its reverse (120300134212), we get a palindrome (332731137233).

The spelling of 212431003021 in words is "two hundred twelve billion, four hundred thirty-one million, three thousand, twenty-one".