123522212251 has 4 divisors (see below), whose sum is σ = 124410861400. Its totient is φ = 122633563104.

The previous prime is 123522212213. The next prime is 123522212257. The reversal of 123522212251 is 152212225321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123522212251 - 2⁷ = 123522212123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123522212257) 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, 444324366 + ... + 444324643.

It is an arithmetic number, because the mean of its divisors is an integer number (31102715350).

Almost surely, 2^123522212251 is an apocalyptic number.

123522212251 is a deficient number, since it is larger than the sum of its proper divisors (888649149).

123522212251 is an equidigital number, since it uses as much as digits as its factorization.

123522212251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888649148.

The product of its digits is 4800, while the sum is 28.

Adding to 123522212251 its reverse (152212225321), we get a palindrome (275734437572).

The spelling of 123522212251 in words is "one hundred twenty-three billion, five hundred twenty-two million, two hundred twelve thousand, two hundred fifty-one".