1222100123 has 4 divisors (see below), whose sum is σ = 1223442528. Its totient is φ = 1220757720.

The previous prime is 1222100071. The next prime is 1222100137. The reversal of 1222100123 is 3210012221.

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 1222100123 - 2⁸ = 1222099867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222100098 and 1222100107.

It is not an unprimeable number, because it can be changed into a prime (1222100623) 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, 669836 + ... + 671657.

It is an arithmetic number, because the mean of its divisors is an integer number (305860632).

Almost surely, 2^1222100123 is an apocalyptic number.

1222100123 is a deficient number, since it is larger than the sum of its proper divisors (1342405).

1222100123 is an equidigital number, since it uses as much as digits as its factorization.

1222100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342404.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1222100123 is about 34958.5486397819. The cubic root of 1222100123 is about 1069.1425054087.

Adding to 1222100123 its reverse (3210012221), we get a palindrome (4432112344).

The spelling of 1222100123 in words is "one billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-three".