127885897021 has 2 divisors, whose sum is σ = 127885897022. Its totient is φ = 127885897020.

The previous prime is 127885897003. The next prime is 127885897067. The reversal of 127885897021 is 120798588721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125086005625 + 2799891396 = 353675^2 + 52914^2 .

It is a cyclic number.

It is not a de Polignac number, because 127885897021 - 2¹⁷ = 127885765949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127885897001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63942948510 + 63942948511.

It is an arithmetic number, because the mean of its divisors is an integer number (63942948511).

Almost surely, 2^127885897021 is an apocalyptic number.

It is an amenable number.

127885897021 is a deficient number, since it is larger than the sum of its proper divisors (1).

127885897021 is an equidigital number, since it uses as much as digits as its factorization.

127885897021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 58.

The spelling of 127885897021 in words is "one hundred twenty-seven billion, eight hundred eighty-five million, eight hundred ninety-seven thousand, twenty-one".