1222522921 has 8 divisors (see below), whose sum is σ = 1294807464. Its totient is φ = 1150279680.

The previous prime is 1222522907. The next prime is 1222522949. The reversal of 1222522921 is 1292252221.

It can be written as a sum of positive squares in 4 ways, for example, as 644601321 + 577921600 = 25389^2 + 24040^2 .

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 1222522921 - 2¹⁹ = 1221998633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222522921.

It is not an unprimeable number, because it can be changed into a prime (1222522901) 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, 67401 + ... + 83593.

It is an arithmetic number, because the mean of its divisors is an integer number (161850933).

Almost surely, 2^1222522921 is an apocalyptic number.

It is an amenable number.

1222522921 is a deficient number, since it is larger than the sum of its proper divisors (72284543).

1222522921 is a wasteful number, since it uses less digits than its factorization.

1222522921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20651.

The product of its digits is 2880, while the sum is 28.

The square root of 1222522921 is about 34964.5952500526. The cubic root of 1222522921 is about 1069.2657847773.

The spelling of 1222522921 in words is "one billion, two hundred twenty-two million, five hundred twenty-two thousand, nine hundred twenty-one".