2130881021 has 2 divisors, whose sum is σ = 2130881022. Its totient is φ = 2130881020.

The previous prime is 2130881009. The next prime is 2130881029. The reversal of 2130881021 is 1201880312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1764924121 + 365956900 = 42011^2 + 19130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130881021 - 2⁶ = 2130880957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130881029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065440510 + 1065440511.

It is an arithmetic number, because the mean of its divisors is an integer number (1065440511).

Almost surely, 2^2130881021 is an apocalyptic number.

It is an amenable number.

2130881021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130881021 is an equidigital number, since it uses as much as digits as its factorization.

2130881021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 2130881021 is about 46161.4668419451. The cubic root of 2130881021 is about 1286.8257233619.

The spelling of 2130881021 in words is "two billion, one hundred thirty million, eight hundred eighty-one thousand, twenty-one".