22154121 has 32 divisors (see below), whose sum is σ = 36220800. Its totient is φ = 13271040.

The previous prime is 22154081. The next prime is 22154131. The reversal of 22154121 is 12145122.

It is not a de Polignac number, because 22154121 - 2⁷ = 22153993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22154094 and 22154103.

It is not an unprimeable number, because it can be changed into a prime (22154131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28425 + ... + 29193.

It is an arithmetic number, because the mean of its divisors is an integer number (1131900).

Almost surely, 2^22154121 is an apocalyptic number.

It is an amenable number.

22154121 is a deficient number, since it is larger than the sum of its proper divisors (14066679).

22154121 is a wasteful number, since it uses less digits than its factorization.

22154121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 22154121 is about 4706.8164400155. The cubic root of 22154121 is about 280.8567339160.

Adding to 22154121 its reverse (12145122), we get a palindrome (34299243).

It can be divided in two parts, 2215 and 4121, that added together give a palindrome (6336).

The spelling of 22154121 in words is "twenty-two million, one hundred fifty-four thousand, one hundred twenty-one".