2975871028421 has 2 divisors, whose sum is σ = 2975871028422. Its totient is φ = 2975871028420.

The previous prime is 2975871028391. The next prime is 2975871028451. The reversal of 2975871028421 is 1248201785792.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2975871028391) and next prime (2975871028451).

It can be written as a sum of positive squares in only one way, i.e., 2112040197796 + 863830830625 = 1453286^2 + 929425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2975871028421 - 2²² = 2975866834117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2975871028451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1487935514210 + 1487935514211.

It is an arithmetic number, because the mean of its divisors is an integer number (1487935514211).

Almost surely, 2^{2975871028421} is an apocalyptic number.

It is an amenable number.

2975871028421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2975871028421 is an equidigital number, since it uses as much as digits as its factorization.

2975871028421 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 56.

The spelling of 2975871028421 in words is "two trillion, nine hundred seventy-five billion, eight hundred seventy-one million, twenty-eight thousand, four hundred twenty-one".