1234031021 has 2 divisors, whose sum is σ = 1234031022. Its totient is φ = 1234031020.

The previous prime is 1234031017. The next prime is 1234031027. The reversal of 1234031021 is 1201304321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865006921 + 369024100 = 29411^2 + 19210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234031021 - 2² = 1234031017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234031027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617015510 + 617015511.

It is an arithmetic number, because the mean of its divisors is an integer number (617015511).

Almost surely, 2^1234031021 is an apocalyptic number.

It is an amenable number.

1234031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234031021 is an equidigital number, since it uses as much as digits as its factorization.

1234031021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1234031021 is about 35128.7776758600. Note that the first 3 decimals coincide. The cubic root of 1234031021 is about 1072.6104546978.

Adding to 1234031021 its reverse (1201304321), we get a palindrome (2435335342).

The spelling of 1234031021 in words is "one billion, two hundred thirty-four million, thirty-one thousand, twenty-one".