2121504023 has 2 divisors, whose sum is σ = 2121504024. Its totient is φ = 2121504022.

The previous prime is 2121503983. The next prime is 2121504031. The reversal of 2121504023 is 3204051212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121504023 - 2¹² = 2121499927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121503986 and 2121504004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121504323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060752011 + 1060752012.

It is an arithmetic number, because the mean of its divisors is an integer number (1060752012).

Almost surely, 2^2121504023 is an apocalyptic number.

2121504023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121504023 is an equidigital number, since it uses as much as digits as its factorization.

2121504023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2121504023 is about 46059.7874832266. The cubic root of 2121504023 is about 1284.9353776543.

Adding to 2121504023 its reverse (3204051212), we get a palindrome (5325555235).

The spelling of 2121504023 in words is "two billion, one hundred twenty-one million, five hundred four thousand, twenty-three".