1222021123 has 4 divisors (see below), whose sum is σ = 1224924208. Its totient is φ = 1219118040.

The previous prime is 1222021121. The next prime is 1222021133. The reversal of 1222021123 is 3211202221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3211202221 = 3191 ⋅1006331.

It is a cyclic number.

It is not a de Polignac number, because 1222021123 - 2¹ = 1222021121 is a prime.

It is a super-2 number, since 2×1222021123² = 2986671250116362258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222021097 and 1222021106.

It is not an unprimeable number, because it can be changed into a prime (1222021121) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1450911 + ... + 1451752.

It is an arithmetic number, because the mean of its divisors is an integer number (306231052).

Almost surely, 2^1222021123 is an apocalyptic number.

1222021123 is a deficient number, since it is larger than the sum of its proper divisors (2903085).

1222021123 is an equidigital number, since it uses as much as digits as its factorization.

1222021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903084.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222021123 is about 34957.4187119129. The cubic root of 1222021123 is about 1069.1194674496.

Adding to 1222021123 its reverse (3211202221), we get a palindrome (4433223344).

The spelling of 1222021123 in words is "one billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-three".