33331220000 has 240 divisors, whose sum is σ = 93514434552. Its totient is φ = 11581440000.

The previous prime is 33331219973. The next prime is 33331220009. The reversal of 33331220000 is 2213333.

It can be written as a sum of positive squares in 20 ways, for example, as 21893345296 + 11437874704 = 147964^2 + 106948^2 .

It is a super-2 number, since 2×33331220000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (33331220009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4416230 + ... + 4423770.

Almost surely, 2^33331220000 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 33331220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46757217276).

33331220000 is an abundant number, since it is smaller than the sum of its proper divisors (60183214552).

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

33331220000 is a wasteful number, since it uses less digits than its factorization.

33331220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601 (or 7578 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 33331220000 its reverse (2213333), we get a palindrome (33333433333).

The spelling of 33331220000 in words is "thirty-three billion, three hundred thirty-one million, two hundred twenty thousand".