1221223022032 has 30 divisors (see below), whose sum is σ = 2562129518982. Its totient is φ = 563641393536.

The previous prime is 1221223022027. The next prime is 1221223022077. The reversal of 1221223022032 is 2302203221221.

It can be written as a sum of positive squares in 3 ways, for example, as 128161136016 + 1093061886016 = 357996^2 + 1045496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221223021994 and 1221223022012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225815163 + ... + 225820570.

Almost surely, 2^{1221223022032} is an apocalyptic number.

It is an amenable number.

1221223022032 is an abundant number, since it is smaller than the sum of its proper divisors (1340906496950).

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

1221223022032 is a wasteful number, since it uses less digits than its factorization.

1221223022032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451635767 (or 451635748 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1221223022032 its reverse (2302203221221), we get a palindrome (3523426243253).

The spelling of 1221223022032 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-two thousand, thirty-two".