22521123155 has 4 divisors (see below), whose sum is σ = 27025347792. Its totient is φ = 18016898520.

The previous prime is 22521123113. The next prime is 22521123241. The reversal of 22521123155 is 55132112522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22521123155 - 2⁶ = 22521123091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252112311 + ... + 2252112320.

It is an arithmetic number, because the mean of its divisors is an integer number (6756336948).

Almost surely, 2^22521123155 is an apocalyptic number.

22521123155 is a deficient number, since it is larger than the sum of its proper divisors (4504224637).

22521123155 is an equidigital number, since it uses as much as digits as its factorization.

22521123155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504224636.

The product of its digits is 6000, while the sum is 29.

Adding to 22521123155 its reverse (55132112522), we get a palindrome (77653235677).

The spelling of 22521123155 in words is "twenty-two billion, five hundred twenty-one million, one hundred twenty-three thousand, one hundred fifty-five".