33010221020 has 144 divisors (see below), whose sum is σ = 81586945440. Its totient is φ = 11185574400.

The previous prime is 33010221017. The next prime is 33010221047. The reversal of 33010221020 is 2012201033.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 33010220986 and 33010221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49939490 + ... + 49940150.

It is an arithmetic number, because the mean of its divisors is an integer number (566576010).

Almost surely, 2^33010221020 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 33010221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40793472720).

33010221020 is an abundant number, since it is smaller than the sum of its proper divisors (48576724420).

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

33010221020 is a wasteful number, since it uses less digits than its factorization.

33010221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 33010221020 its reverse (2012201033), we get a palindrome (35022422053).

The spelling of 33010221020 in words is "thirty-three billion, ten million, two hundred twenty-one thousand, twenty".