1992100121 has 4 divisors (see below), whose sum is σ = 2173200144. Its totient is φ = 1811000100.

The previous prime is 1992100111. The next prime is 1992100147. The reversal of 1992100121 is 1210012991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1992100121 - 2⁶ = 1992100057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992100111) 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, 90549995 + ... + 90550016.

It is an arithmetic number, because the mean of its divisors is an integer number (543300036).

Almost surely, 2^1992100121 is an apocalyptic number.

1992100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1992100121 is a deficient number, since it is larger than the sum of its proper divisors (181100023).

1992100121 is a wasteful number, since it uses less digits than its factorization.

1992100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181100022.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1992100121 is about 44632.9488270717. The cubic root of 1992100121 is about 1258.2599903025.

The spelling of 1992100121 in words is "one billion, nine hundred ninety-two million, one hundred thousand, one hundred twenty-one".