1222403021 has 16 divisors (see below), whose sum is σ = 1413552000. Its totient is φ = 1035417600.

The previous prime is 1222403009. The next prime is 1222403029. The reversal of 1222403021 is 1203042221.

It is not a de Polignac number, because 1222403021 - 2⁶ = 1222402957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222403029) 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, 814730 + ... + 816228.

It is an arithmetic number, because the mean of its divisors is an integer number (88347000).

Almost surely, 2^1222403021 is an apocalyptic number.

It is an amenable number.

1222403021 is a deficient number, since it is larger than the sum of its proper divisors (191148979).

1222403021 is a wasteful number, since it uses less digits than its factorization.

1222403021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1222403021 is about 34962.8806164481. The cubic root of 1222403021 is about 1069.2308272435.

Adding to 1222403021 its reverse (1203042221), we get a palindrome (2425445242).

The spelling of 1222403021 in words is "one billion, two hundred twenty-two million, four hundred three thousand, twenty-one".