2885821021 has 2 divisors, whose sum is σ = 2885821022. Its totient is φ = 2885821020.

The previous prime is 2885820997. The next prime is 2885821027. The reversal of 2885821021 is 1201285882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2028151225 + 857669796 = 45035^2 + 29286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2885821021 - 2¹⁷ = 2885689949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2885821027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1442910510 + 1442910511.

It is an arithmetic number, because the mean of its divisors is an integer number (1442910511).

Almost surely, 2^2885821021 is an apocalyptic number.

It is an amenable number.

2885821021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2885821021 is an equidigital number, since it uses as much as digits as its factorization.

2885821021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 2885821021 is about 53719.8382443581. The cubic root of 2885821021 is about 1423.7152299843.

The spelling of 2885821021 in words is "two billion, eight hundred eighty-five million, eight hundred twenty-one thousand, twenty-one".