33121143412 has 12 divisors (see below), whose sum is σ = 66242286880. Its totient is φ = 14194775736.

The previous prime is 33121143379. The next prime is 33121143449. The reversal of 33121143412 is 21434112133.

33121143412 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591448962 + ... + 591449017.

Almost surely, 2^33121143412 is an apocalyptic number.

It is an amenable number.

33121143412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

33121143412 is a wasteful number, since it uses less digits than its factorization.

33121143412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182897990 (or 1182897988 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 33121143412 its reverse (21434112133), we get a palindrome (54555255545).

The spelling of 33121143412 in words is "thirty-three billion, one hundred twenty-one million, one hundred forty-three thousand, four hundred twelve".