2112129989 has 2 divisors, whose sum is σ = 2112129990. Its totient is φ = 2112129988.

The previous prime is 2112129973. The next prime is 2112130021. The reversal of 2112129989 is 9899212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1998537025 + 113592964 = 44705^2 + 10658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112129989 - 2⁴ = 2112129973 is a prime.

It is a super-2 number, since 2×2112129989² = 8922186180866280242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112129689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056064994 + 1056064995.

It is an arithmetic number, because the mean of its divisors is an integer number (1056064995).

Almost surely, 2^2112129989 is an apocalyptic number.

It is an amenable number.

2112129989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112129989 is an equidigital number, since it uses as much as digits as its factorization.

2112129989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 44.

The square root of 2112129989 is about 45957.9154118200. The cubic root of 2112129989 is about 1283.0400536919.

The spelling of 2112129989 in words is "two billion, one hundred twelve million, one hundred twenty-nine thousand, nine hundred eighty-nine".