4521268055921 has 2 divisors, whose sum is σ = 4521268055922. Its totient is φ = 4521268055920.

The previous prime is 4521268055869. The next prime is 4521268055929. The reversal of 4521268055921 is 1295508621254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4439600705296 + 81667350625 = 2107036^2 + 285775^2 .

It is a cyclic number.

It is not a de Polignac number, because 4521268055921 - 2²² = 4521263861617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4521268055921.

It is not a weakly prime, because it can be changed into another prime (4521268055929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2260634027960 + 2260634027961.

It is an arithmetic number, because the mean of its divisors is an integer number (2260634027961).

Almost surely, 2^{4521268055921} is an apocalyptic number.

It is an amenable number.

4521268055921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4521268055921 is an equidigital number, since it uses as much as digits as its factorization.

4521268055921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 4521268055921 in words is "four trillion, five hundred twenty-one billion, two hundred sixty-eight million, fifty-five thousand, nine hundred twenty-one".