992199012121 has 2 divisors, whose sum is σ = 992199012122. Its totient is φ = 992199012120.

The previous prime is 992199012053. The next prime is 992199012137. The reversal of 992199012121 is 121210991299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980694090000 + 11504922121 = 990300^2 + 107261^2 .

It is a cyclic number.

It is not a de Polignac number, because 992199012121 - 2²³ = 992190623513 is a prime.

It is not a weakly prime, because it can be changed into another prime (992199012221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496099506060 + 496099506061.

It is an arithmetic number, because the mean of its divisors is an integer number (496099506061).

Almost surely, 2^992199012121 is an apocalyptic number.

It is an amenable number.

992199012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

992199012121 is an equidigital number, since it uses as much as digits as its factorization.

992199012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 992199012121 in words is "nine hundred ninety-two billion, one hundred ninety-nine million, twelve thousand, one hundred twenty-one".