33112123220 has 48 divisors (see below), whose sum is σ = 77470864128. Its totient is φ = 11784581760.

The previous prime is 33112123189. The next prime is 33112123241. The reversal of 33112123220 is 2232121133.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33112123192 and 33112123201.

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, 1590827 + ... + 1611506.

It is an arithmetic number, because the mean of its divisors is an integer number (1613976336).

Almost surely, 2^33112123220 is an apocalyptic number.

It is an amenable number.

33112123220 is an abundant number, since it is smaller than the sum of its proper divisors (44358740908).

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

33112123220 is a wasteful number, since it uses less digits than its factorization.

33112123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202400 (or 3202398 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33112123220 its reverse (2232121133), we get a palindrome (35344244353).

The spelling of 33112123220 in words is "thirty-three billion, one hundred twelve million, one hundred twenty-three thousand, two hundred twenty".