33123031212 has 12 divisors (see below), whose sum is σ = 77287072856. Its totient is φ = 11041010400.

The previous prime is 33123031177. The next prime is 33123031213. The reversal of 33123031212 is 21213032133.

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

It is a super-2 number, since 2×33123031212² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33123031213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380126289 + ... + 1380126312.

Almost surely, 2^33123031212 is an apocalyptic number.

It is an amenable number.

33123031212 is an abundant number, since it is smaller than the sum of its proper divisors (44164041644).

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

33123031212 is a wasteful number, since it uses less digits than its factorization.

33123031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760252608 (or 2760252606 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 33123031212 its reverse (21213032133), we get a palindrome (54336063345).

The spelling of 33123031212 in words is "thirty-three billion, one hundred twenty-three million, thirty-one thousand, two hundred twelve".