1221893883 has 128 divisors (see below), whose sum is σ = 2269347840. Its totient is φ = 634677120.

The previous prime is 1221893833. The next prime is 1221893899. The reversal of 1221893883 is 3883981221.

It is a happy number.

It is not a de Polignac number, because 1221893883 - 2¹⁶ = 1221828347 is a prime.

It is a super-2 number, since 2×1221893883² = 2986049322625635378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221893833) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11419516 + ... + 11419622.

It is an arithmetic number, because the mean of its divisors is an integer number (17729280).

Almost surely, 2^1221893883 is an apocalyptic number.

1221893883 is a deficient number, since it is larger than the sum of its proper divisors (1047453957).

1221893883 is a wasteful number, since it uses less digits than its factorization.

1221893883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1221893883 is about 34955.5987361109. The cubic root of 1221893883 is about 1069.0823596669.

The spelling of 1221893883 in words is "one billion, two hundred twenty-one million, eight hundred ninety-three thousand, eight hundred eighty-three".