1221110231132 has 72 divisors (see below), whose sum is σ = 2487528964368. Its totient is φ = 522297402880.

The previous prime is 1221110231119. The next prime is 1221110231141. The reversal of 1221110231132 is 2311320111221.

It is a super-2 number, since 2×1221110231132² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53989058 + ... + 54011670.

It is an arithmetic number, because the mean of its divisors is an integer number (34549013394).

Almost surely, 2^{1221110231132} is an apocalyptic number.

It is an amenable number.

1221110231132 is an abundant number, since it is smaller than the sum of its proper divisors (1266418733236).

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

1221110231132 is a wasteful number, since it uses less digits than its factorization.

1221110231132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29219 (or 29206 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1221110231132 its reverse (2311320111221), we get a palindrome (3532430342353).

The spelling of 1221110231132 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred thirty-one thousand, one hundred thirty-two".