1222124021 has 16 divisors (see below), whose sum is σ = 1289046528. Its totient is φ = 1156412400.

The previous prime is 1222124011. The next prime is 1222124039. The reversal of 1222124021 is 1204212221.

It is a de Polignac number, because none of the positive numbers 2^k-1222124021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222124011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1768286 + ... + 1768976.

It is an arithmetic number, because the mean of its divisors is an integer number (80565408).

Almost surely, 2^1222124021 is an apocalyptic number.

It is an amenable number.

1222124021 is a deficient number, since it is larger than the sum of its proper divisors (66922507).

1222124021 is a wasteful number, since it uses less digits than its factorization.

1222124021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1222124021 is about 34958.8904429188. The cubic root of 1222124021 is about 1069.1494743415.

Adding to 1222124021 its reverse (1204212221), we get a palindrome (2426336242).

The spelling of 1222124021 in words is "one billion, two hundred twenty-two million, one hundred twenty-four thousand, twenty-one".