3124231021 has 2 divisors, whose sum is σ = 3124231022. Its totient is φ = 3124231020.

The previous prime is 3124231007. The next prime is 3124231027. The reversal of 3124231021 is 1201324213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2007936100 + 1116294921 = 44810^2 + 33411^2 .

It is a cyclic number.

It is not a de Polignac number, because 3124231021 - 2⁹ = 3124230509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3124231021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3124231027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1562115510 + 1562115511.

It is an arithmetic number, because the mean of its divisors is an integer number (1562115511).

Almost surely, 2^3124231021 is an apocalyptic number.

It is an amenable number.

3124231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3124231021 is an equidigital number, since it uses as much as digits as its factorization.

3124231021 is an evil number, because the sum of its binary digits is even.

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

The square root of 3124231021 is about 55894.8210570532. The cubic root of 3124231021 is about 1461.8889388294. Note that the first 3 decimals are identical.

Adding to 3124231021 its reverse (1201324213), we get a palindrome (4325555234).

The spelling of 3124231021 in words is "three billion, one hundred twenty-four million, two hundred thirty-one thousand, twenty-one".