1221120232 has 16 divisors (see below), whose sum is σ = 2389148640. Its totient is φ = 584013936.

The previous prime is 1221120211. The next prime is 1221120233. The reversal of 1221120232 is 2320211221.

It is a happy number.

It is a super-2 number, since 2×1221120232² = 2982269241999467648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221120233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3318078 + ... + 3318445.

It is an arithmetic number, because the mean of its divisors is an integer number (149321790).

Almost surely, 2^1221120232 is an apocalyptic number.

It is an amenable number.

1221120232 is a deficient number, since it is larger than the sum of its proper divisors (1168028408).

1221120232 is a wasteful number, since it uses less digits than its factorization.

1221120232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636552 (or 6636548 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221120232 is about 34944.5307880933. The cubic root of 1221120232 is about 1068.8566796057.

Adding to 1221120232 its reverse (2320211221), we get a palindrome (3541331453).

The spelling of 1221120232 in words is "one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred thirty-two".