1221322122132 has 72 divisors (see below), whose sum is σ = 3315189902976. Its totient is φ = 348930997632.

The previous prime is 1221322122127. The next prime is 1221322122143. The reversal of 1221322122132 is 2312212231221.

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 14624848 + ... + 14708120.

It is an arithmetic number, because the mean of its divisors is an integer number (46044304208).

Almost surely, 2^{1221322122132} is an apocalyptic number.

1221322122132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221322122132 is an abundant number, since it is smaller than the sum of its proper divisors (2093867780844).

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

1221322122132 is a wasteful number, since it uses less digits than its factorization.

1221322122132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108237 (or 108228 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 1221322122132 its reverse (2312212231221), we get a palindrome (3533534353353).

The spelling of 1221322122132 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-two thousand, one hundred thirty-two".