1222215969 has 24 divisors (see below), whose sum is σ = 1864300480. Its totient is φ = 707883264.

The previous prime is 1222215941. The next prime is 1222215971. The reversal of 1222215969 is 9695122221.

It is not a de Polignac number, because 1222215969 - 2⁵ = 1222215937 is a prime.

It is a super-2 number, since 2×1222215969² = 2987623749757217922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222215569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42949 + ... + 65490.

Almost surely, 2^1222215969 is an apocalyptic number.

It is an amenable number.

1222215969 is a deficient number, since it is larger than the sum of its proper divisors (642084511).

1222215969 is a wasteful number, since it uses less digits than its factorization.

1222215969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108489 (or 108472 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1222215969 is about 34960.2055056889. The cubic root of 1222215969 is about 1069.1762865932.

The spelling of 1222215969 in words is "one billion, two hundred twenty-two million, two hundred fifteen thousand, nine hundred sixty-nine".