111922121 has 4 divisors (see below), whose sum is σ = 115532544. Its totient is φ = 108311700.

The previous prime is 111922099. The next prime is 111922133. The reversal of 111922121 is 121229111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121229111 = 397 ⋅305363.

It is a cyclic number.

It is not a de Polignac number, because 111922121 - 2²² = 107727817 is a prime.

It is a super-2 number, since 2×111922121² = 25053122338277282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111922093 and 111922102.

It is not an unprimeable number, because it can be changed into a prime (111928121) 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, 1805165 + ... + 1805226.

It is an arithmetic number, because the mean of its divisors is an integer number (28883136).

Almost surely, 2^111922121 is an apocalyptic number.

It is an amenable number.

111922121 is a deficient number, since it is larger than the sum of its proper divisors (3610423).

111922121 is an equidigital number, since it uses as much as digits as its factorization.

111922121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610422.

The product of its digits is 72, while the sum is 20.

The square root of 111922121 is about 10579.3251675142. The cubic root of 111922121 is about 481.9167010543.

The spelling of 111922121 in words is "one hundred eleven million, nine hundred twenty-two thousand, one hundred twenty-one".