1221220102232 has 128 divisors (see below), whose sum is σ = 2726798256000. Its totient is φ = 507845775360.

The previous prime is 1221220102231. The next prime is 1221220102247. The reversal of 1221220102232 is 2322010221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221220102231) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2629394 + ... + 3058782.

It is an arithmetic number, because the mean of its divisors is an integer number (21303111375).

Almost surely, 2^{1221220102232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221220102232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363399128000).

1221220102232 is an abundant number, since it is smaller than the sum of its proper divisors (1505578153768).

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

1221220102232 is a wasteful number, since it uses less digits than its factorization.

1221220102232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429501 (or 429497 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221220102232 its reverse (2322010221221), we get a palindrome (3543230323453).

The spelling of 1221220102232 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred thirty-two".