22121254 has 4 divisors (see below), whose sum is σ = 33181884. Its totient is φ = 11060626.

The previous prime is 22121213. The next prime is 22121293. The reversal of 22121254 is 45212122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45212122 = 2 ⋅22606061.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5530312 + ... + 5530315.

It is an arithmetic number, because the mean of its divisors is an integer number (8295471).

Almost surely, 2^22121254 is an apocalyptic number.

22121254 is a deficient number, since it is larger than the sum of its proper divisors (11060630).

22121254 is a wasteful number, since it uses less digits than its factorization.

22121254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060629.

The product of its digits is 320, while the sum is 19.

The square root of 22121254 is about 4703.3237183932. The cubic root of 22121254 is about 280.7177757673.

Adding to 22121254 its reverse (45212122), we get a palindrome (67333376).

The spelling of 22121254 in words is "twenty-two million, one hundred twenty-one thousand, two hundred fifty-four".