1221212113332 has 12 divisors (see below), whose sum is σ = 2849494931136. Its totient is φ = 407070704440.

The previous prime is 1221212113223. The next prime is 1221212113349. The reversal of 1221212113332 is 2333112121221.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1221212113332² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 50883838044 + ... + 50883838067.

It is an arithmetic number, because the mean of its divisors is an integer number (237457910928).

Almost surely, 2^{1221212113332} is an apocalyptic number.

1221212113332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221212113332 is an abundant number, since it is smaller than the sum of its proper divisors (1628282817804).

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

1221212113332 is a wasteful number, since it uses less digits than its factorization.

1221212113332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101767676118 (or 101767676116 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 1221212113332 its reverse (2333112121221), we get a palindrome (3554324234553).

The spelling of 1221212113332 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred thirteen thousand, three hundred thirty-two".