100192121 has 4 divisors (see below), whose sum is σ = 100241652. Its totient is φ = 100142592.

The previous prime is 100192091. The next prime is 100192123. The reversal of 100192121 is 121291001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3759721 + 96432400 = 1939^2 + 9820^2 .

It is a cyclic number.

It is not a de Polignac number, because 100192121 - 2¹⁴ = 100175737 is a prime.

It is a super-2 number, since 2×100192121² = 20076922220957282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100192121.

It is not an unprimeable number, because it can be changed into a prime (100192123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21596 + ... + 25821.

It is an arithmetic number, because the mean of its divisors is an integer number (25060413).

Almost surely, 2^100192121 is an apocalyptic number.

It is an amenable number.

100192121 is a deficient number, since it is larger than the sum of its proper divisors (49531).

100192121 is an equidigital number, since it uses as much as digits as its factorization.

100192121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49530.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 100192121 is about 10009.6014406169. The cubic root of 100192121 is about 464.4559421011.

The spelling of 100192121 in words is "one hundred million, one hundred ninety-two thousand, one hundred twenty-one".