2102220961 has 2 divisors, whose sum is σ = 2102220962. Its totient is φ = 2102220960.

The previous prime is 2102220899. The next prime is 2102220973. The reversal of 2102220961 is 1690222012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2037980736 + 64240225 = 45144^2 + 8015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102220961 - 2¹⁷ = 2102089889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051110480 + 1051110481.

It is an arithmetic number, because the mean of its divisors is an integer number (1051110481).

Almost surely, 2^2102220961 is an apocalyptic number.

It is an amenable number.

2102220961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102220961 is an equidigital number, since it uses as much as digits as its factorization.

2102220961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2102220961 is about 45849.9832170089. The cubic root of 2102220961 is about 1281.0304529756.

Adding to 2102220961 its reverse (1690222012), we get a palindrome (3792442973).

The spelling of 2102220961 in words is "two billion, one hundred two million, two hundred twenty thousand, nine hundred sixty-one".