1222502721 has 16 divisors (see below), whose sum is σ = 1778837760. Its totient is φ = 740639120.

The previous prime is 1222502719. The next prime is 1222502741. The reversal of 1222502721 is 1272052221.

It is a cyclic number.

It is not a de Polignac number, because 1222502721 - 2¹ = 1222502719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222502691 and 1222502700.

It is not an unprimeable number, because it can be changed into a prime (1222502711) 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, 119806 + ... + 129608.

It is an arithmetic number, because the mean of its divisors is an integer number (111177360).

Almost surely, 2^1222502721 is an apocalyptic number.

1222502721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222502721 is a deficient number, since it is larger than the sum of its proper divisors (556335039).

1222502721 is a wasteful number, since it uses less digits than its factorization.

1222502721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13596.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1222502721 is about 34964.3063852266. The cubic root of 1222502721 is about 1069.2598955114.

Adding to 1222502721 its reverse (1272052221), we get a palindrome (2494554942).

The spelling of 1222502721 in words is "one billion, two hundred twenty-two million, five hundred two thousand, seven hundred twenty-one".