1221122032 has 20 divisors (see below), whose sum is σ = 2547918520. Its totient is φ = 563594688.

The previous prime is 1221122009. The next prime is 1221122059. The reversal of 1221122032 is 2302211221.

It is a happy number.

It is a super-2 number, since 2×1221122032² = 2982278034071618048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1221121997 and 1221122015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2935182 + ... + 2935597.

It is an arithmetic number, because the mean of its divisors is an integer number (127395926).

Almost surely, 2^1221122032 is an apocalyptic number.

It is an amenable number.

1221122032 is an abundant number, since it is smaller than the sum of its proper divisors (1326796488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221122032 is a wasteful number, since it uses less digits than its factorization.

1221122032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870800 (or 5870794 counting only the distinct ones).

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

The square root of 1221122032 is about 34944.5565431871. The cubic root of 1221122032 is about 1068.8572047905.

Adding to 1221122032 its reverse (2302211221), we get a palindrome (3523333253).

It can be divided in two parts, 12211 and 22032, that added together give a palindrome (34243).

The spelling of 1221122032 in words is "one billion, two hundred twenty-one million, one hundred twenty-two thousand, thirty-two".