421205152453153 has 2 divisors, whose sum is σ = 421205152453154. Its totient is φ = 421205152453152.

The previous prime is 421205152453003. The next prime is 421205152453247. The reversal of 421205152453153 is 351354251502124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412949828241889 + 8255324211264 = 20321167^2 + 2873208^2 .

It is a cyclic number.

It is not a de Polignac number, because 421205152453153 - 2²⁵ = 421205118898721 is a prime.

It is not a weakly prime, because it can be changed into another prime (421205152453753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210602576226576 + 210602576226577.

It is an arithmetic number, because the mean of its divisors is an integer number (210602576226577).

Almost surely, 2^{421205152453153} is an apocalyptic number.

It is an amenable number.

421205152453153 is a deficient number, since it is larger than the sum of its proper divisors (1).

421205152453153 is an equidigital number, since it uses as much as digits as its factorization.

421205152453153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 421205152453153 in words is "four hundred twenty-one trillion, two hundred five billion, one hundred fifty-two million, four hundred fifty-three thousand, one hundred fifty-three".