1222013123 has 4 divisors (see below), whose sum is σ = 1222716768. Its totient is φ = 1221309480.

The previous prime is 1222013059. The next prime is 1222013137. The reversal of 1222013123 is 3213102221.

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 1222013123 - 2⁶ = 1222013059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222013423) 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, 349211 + ... + 352692.

It is an arithmetic number, because the mean of its divisors is an integer number (305679192).

Almost surely, 2^1222013123 is an apocalyptic number.

1222013123 is a deficient number, since it is larger than the sum of its proper divisors (703645).

1222013123 is an equidigital number, since it uses as much as digits as its factorization.

1222013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703644.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1222013123 is about 34957.3042868011. The cubic root of 1222013123 is about 1069.1171344363.

Adding to 1222013123 its reverse (3213102221), we get a palindrome (4435115344).

The spelling of 1222013123 in words is "one billion, two hundred twenty-two million, thirteen thousand, one hundred twenty-three".