1221116332 has 6 divisors (see below), whose sum is σ = 2136953588. Its totient is φ = 610558164.

The previous prime is 1221116317. The next prime is 1221116357. The reversal of 1221116332 is 2336111221.

It is a happy number.

It is a super-4 number, since 4×1221116332⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152639538 + ... + 152639545.

Almost surely, 2^1221116332 is an apocalyptic number.

It is an amenable number.

1221116332 is a deficient number, since it is larger than the sum of its proper divisors (915837256).

1221116332 is a wasteful number, since it uses less digits than its factorization.

1221116332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305279087 (or 305279085 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1221116332 is about 34944.4749853249. The cubic root of 1221116332 is about 1068.8555417037.

Adding to 1221116332 its reverse (2336111221), we get a palindrome (3557227553).

The spelling of 1221116332 in words is "one billion, two hundred twenty-one million, one hundred sixteen thousand, three hundred thirty-two".