33213100312 has 64 divisors (see below), whose sum is σ = 71990392320. Its totient is φ = 14070647808.

The previous prime is 33213100307. The next prime is 33213100351. The reversal of 33213100312 is 21300131233.

It is a super-2 number, since 2×33213100312² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33213100312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5249583 + ... + 5255905.

It is an arithmetic number, because the mean of its divisors is an integer number (1124849880).

Almost surely, 2^33213100312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33213100312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35995196160).

33213100312 is an abundant number, since it is smaller than the sum of its proper divisors (38777292008).

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

33213100312 is a wasteful number, since it uses less digits than its factorization.

33213100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 33213100312 its reverse (21300131233), we get a palindrome (54513231545).

The spelling of 33213100312 in words is "thirty-three billion, two hundred thirteen million, one hundred thousand, three hundred twelve".