420227128897 has 2 divisors, whose sum is σ = 420227128898. Its totient is φ = 420227128896.

The previous prime is 420227128877. The next prime is 420227128939. The reversal of 420227128897 is 798821722024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419701848336 + 525280561 = 647844^2 + 22919^2 .

It is a cyclic number.

It is not a de Polignac number, because 420227128897 - 2²³ = 420218740289 is a prime.

It is a super-2 number, since 2×420227128897² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420227128817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210113564448 + 210113564449.

It is an arithmetic number, because the mean of its divisors is an integer number (210113564449).

Almost surely, 2^420227128897 is an apocalyptic number.

It is an amenable number.

420227128897 is a deficient number, since it is larger than the sum of its proper divisors (1).

420227128897 is an equidigital number, since it uses as much as digits as its factorization.

420227128897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 420227128897 in words is "four hundred twenty billion, two hundred twenty-seven million, one hundred twenty-eight thousand, eight hundred ninety-seven".