2121504031 has 2 divisors, whose sum is σ = 2121504032. Its totient is φ = 2121504030.

The previous prime is 2121504023. The next prime is 2121504037. The reversal of 2121504031 is 1304051212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121504031 - 2³ = 2121504023 is a prime.

It is a super-2 number, since 2×2121504031² = 9001558707098497922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121504037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060752015 + 1060752016.

It is an arithmetic number, because the mean of its divisors is an integer number (1060752016).

Almost surely, 2^2121504031 is an apocalyptic number.

2121504031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121504031 is an equidigital number, since it uses as much as digits as its factorization.

2121504031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2121504031 is about 46059.7875700703. The cubic root of 2121504031 is about 1284.9353792694.

Adding to 2121504031 its reverse (1304051212), we get a palindrome (3425555243).

The spelling of 2121504031 in words is "two billion, one hundred twenty-one million, five hundred four thousand, thirty-one".