2102121169 has 2 divisors, whose sum is σ = 2102121170. Its totient is φ = 2102121168.

The previous prime is 2102121157. The next prime is 2102121223. The reversal of 2102121169 is 9611212012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071711169 + 1030410000 = 32737^2 + 32100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102121169 - 2⁵ = 2102121137 is a prime.

It is a super-2 number, since 2×2102121169² = 8837826818315853122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2102121569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051060584 + 1051060585.

It is an arithmetic number, because the mean of its divisors is an integer number (1051060585).

Almost surely, 2^2102121169 is an apocalyptic number.

It is an amenable number.

2102121169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102121169 is an equidigital number, since it uses as much as digits as its factorization.

2102121169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 2102121169 is about 45848.8949594208. The cubic root of 2102121169 is about 1281.0101825702.

The spelling of 2102121169 in words is "two billion, one hundred two million, one hundred twenty-one thousand, one hundred sixty-nine".