9122881021 has 2 divisors, whose sum is σ = 9122881022. Its totient is φ = 9122881020.

The previous prime is 9122880919. The next prime is 9122881057. The reversal of 9122881021 is 1201882219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8795813796 + 327067225 = 93786^2 + 18085^2 .

It is a cyclic number.

It is not a de Polignac number, because 9122881021 - 2²¹ = 9120783869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9152881021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4561440510 + 4561440511.

It is an arithmetic number, because the mean of its divisors is an integer number (4561440511).

Almost surely, 2^9122881021 is an apocalyptic number.

It is an amenable number.

9122881021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9122881021 is an equidigital number, since it uses as much as digits as its factorization.

9122881021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 9122881021 is about 95513.7739857451. The cubic root of 9122881021 is about 2089.5078334860.

The spelling of 9122881021 in words is "nine billion, one hundred twenty-two million, eight hundred eighty-one thousand, twenty-one".