22400121 has 8 divisors (see below), whose sum is σ = 29918464. Its totient is φ = 14907600.

The previous prime is 22400111. The next prime is 22400149. The reversal of 22400121 is 12100422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22400121 - 2⁶ = 22400057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22400097 and 22400106.

It is not an unprimeable number, because it can be changed into a prime (22400111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4330 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (3739808).

Almost surely, 2^22400121 is an apocalyptic number.

It is an amenable number.

22400121 is a deficient number, since it is larger than the sum of its proper divisors (7518343).

22400121 is a wasteful number, since it uses less digits than its factorization.

22400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12911.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22400121 is about 4732.8766094205. The cubic root of 22400121 is about 281.8924568550.

Adding to 22400121 its reverse (12100422), we get a palindrome (34500543).

The spelling of 22400121 in words is "twenty-two million, four hundred thousand, one hundred twenty-one".