1221011032 has 32 divisors (see below), whose sum is σ = 2337342480. Its totient is φ = 597767040.

The previous prime is 1221011027. The next prime is 1221011039. The reversal of 1221011032 is 2301101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221011039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226723 + ... + 232045.

Almost surely, 2^1221011032 is an apocalyptic number.

It is an amenable number.

1221011032 is a deficient number, since it is larger than the sum of its proper divisors (1116331448).

1221011032 is a wasteful number, since it uses less digits than its factorization.

1221011032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923 (or 5919 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1221011032 is about 34942.9682768937. The cubic root of 1221011032 is about 1068.8248174337.

Adding to 1221011032 its reverse (2301101221), we get a palindrome (3522112253).

The spelling of 1221011032 in words is "one billion, two hundred twenty-one million, eleven thousand, thirty-two".