33105121220 has 48 divisors (see below), whose sum is σ = 71172571008. Its totient is φ = 12927720960.

The previous prime is 33105121213. The next prime is 33105121243. The reversal of 33105121220 is 2212150133.

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 = 33105121192 and 33105121201.

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, 1979132 + ... + 1995788.

It is an arithmetic number, because the mean of its divisors is an integer number (1482761896).

Almost surely, 2^33105121220 is an apocalyptic number.

It is an amenable number.

33105121220 is an abundant number, since it is smaller than the sum of its proper divisors (38067449788).

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

33105121220 is a wasteful number, since it uses less digits than its factorization.

33105121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19020 (or 19018 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 33105121220 its reverse (2212150133), we get a palindrome (35317271353).

The spelling of 33105121220 in words is "thirty-three billion, one hundred five million, one hundred twenty-one thousand, two hundred twenty".