1222560221 has 8 divisors (see below), whose sum is σ = 1275913080. Its totient is φ = 1169953792.

The previous prime is 1222560211. The next prime is 1222560271. The reversal of 1222560221 is 1220652221.

It can be written as a sum of positive squares in 4 ways, for example, as 151634596 + 1070925625 = 12314^2 + 32725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222560221 - 2²² = 1218365917 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 (1222560211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183260 + ... + 189813.

It is an arithmetic number, because the mean of its divisors is an integer number (159489135).

Almost surely, 2^1222560221 is an apocalyptic number.

It is an amenable number.

1222560221 is a deficient number, since it is larger than the sum of its proper divisors (53352859).

1222560221 is a wasteful number, since it uses less digits than its factorization.

1222560221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373215.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1222560221 is about 34965.1286426920. The cubic root of 1222560221 is about 1069.2766593405.

The spelling of 1222560221 in words is "one billion, two hundred twenty-two million, five hundred sixty thousand, two hundred twenty-one".