1221333296 has 40 divisors (see below), whose sum is σ = 2437244304. Its totient is φ = 592462080.

The previous prime is 1221333287. The next prime is 1221333307. The reversal of 1221333296 is 6923331221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218051 + ... + 223581.

Almost surely, 2^1221333296 is an apocalyptic number.

1221333296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1221333296 is a deficient number, since it is larger than the sum of its proper divisors (1215911008).

1221333296 is a wasteful number, since it uses less digits than its factorization.

1221333296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5949 (or 5943 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 1221333296 is about 34947.5792580831. The cubic root of 1221333296 is about 1068.9188415533.

It can be divided in two parts, 12 and 21333296, that multiplied together give a palindrome (255999552).

The spelling of 1221333296 in words is "one billion, two hundred twenty-one million, three hundred thirty-three thousand, two hundred ninety-six".