1221021244232 has 32 divisors (see below), whose sum is σ = 2466017671680. Its totient is φ = 565129044480.

The previous prime is 1221021244231. The next prime is 1221021244321. The reversal of 1221021244232 is 2324421201221.

It is a happy number.

It is a super-2 number, since 2×1221021244232² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221021244231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107026313 + ... + 107037720.

It is an arithmetic number, because the mean of its divisors is an integer number (77063052240).

Almost surely, 2^{1221021244232} is an apocalyptic number.

It is an amenable number.

1221021244232 is an abundant number, since it is smaller than the sum of its proper divisors (1244996427448).

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

1221021244232 is a wasteful number, since it uses less digits than its factorization.

1221021244232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214064093 (or 214064089 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1221021244232 its reverse (2324421201221), we get a palindrome (3545442445453).

The spelling of 1221021244232 in words is "one trillion, two hundred twenty-one billion, twenty-one million, two hundred forty-four thousand, two hundred thirty-two".