33051220000 has 120 divisors (see below), whose sum is σ = 81614196972. Its totient is φ = 13171200000.

The previous prime is 33051219991. The next prime is 33051220003. The reversal of 33051220000 is 2215033.

It can be written as a sum of positive squares in 10 ways, for example, as 4343056 + 33046876944 = 2084^2 + 181788^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33051220003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5617060 + ... + 5622940.

Almost surely, 2^33051220000 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 33051220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40807098486).

33051220000 is an abundant number, since it is smaller than the sum of its proper divisors (48562976972).

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

33051220000 is an equidigital number, since it uses as much as digits as its factorization.

33051220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192 (or 6169 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 33051220000 its reverse (2215033), we get a palindrome (33053435033).

The spelling of 33051220000 in words is "thirty-three billion, fifty-one million, two hundred twenty thousand".