420151420452121 has 2 divisors, whose sum is σ = 420151420452122. Its totient is φ = 420151420452120.

The previous prime is 420151420452007. The next prime is 420151420452149. The reversal of 420151420452121 is 121254024151024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419273292154896 + 878128297225 = 20476164^2 + 937085^2 .

It is a cyclic number.

It is not a de Polignac number, because 420151420452121 - 2⁴³ = 411355327429913 is a prime.

It is a super-2 number, since 2×420151420452121² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420151420452161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210075710226060 + 210075710226061.

It is an arithmetic number, because the mean of its divisors is an integer number (210075710226061).

Almost surely, 2^{420151420452121} is an apocalyptic number.

It is an amenable number.

420151420452121 is a deficient number, since it is larger than the sum of its proper divisors (1).

420151420452121 is an equidigital number, since it uses as much as digits as its factorization.

420151420452121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 34.

The spelling of 420151420452121 in words is "four hundred twenty trillion, one hundred fifty-one billion, four hundred twenty million, four hundred fifty-two thousand, one hundred twenty-one".