1213121333112 has 64 divisors (see below), whose sum is σ = 3299767070880. Its totient is φ = 369419968512.

The previous prime is 1213121333059. The next prime is 1213121333119. The reversal of 1213121333112 is 2113331213121.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213121333119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20012053 + ... + 20072580.

Almost surely, 2^{1213121333112} is an apocalyptic number.

1213121333112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213121333112 is an abundant number, since it is smaller than the sum of its proper divisors (2086645737768).

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

1213121333112 is a wasteful number, since it uses less digits than its factorization.

1213121333112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40084752 (or 40084748 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

Adding to 1213121333112 its reverse (2113331213121), we get a palindrome (3326452546233).

The spelling of 1213121333112 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, three hundred thirty-three thousand, one hundred twelve".