33100221020 has 24 divisors (see below), whose sum is σ = 70160099184. Its totient is φ = 13116348416.

The previous prime is 33100221001. The next prime is 33100221041. The reversal of 33100221020 is 2012200133.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 33100220986 and 33100221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7731557 + ... + 7735836.

It is an arithmetic number, because the mean of its divisors is an integer number (2923337466).

Almost surely, 2^33100221020 is an apocalyptic number.

It is an amenable number.

33100221020 is an abundant number, since it is smaller than the sum of its proper divisors (37059878164).

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

33100221020 is a wasteful number, since it uses less digits than its factorization.

33100221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15467509 (or 15467507 counting only the distinct ones).

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

Adding to 33100221020 its reverse (2012200133), we get a palindrome (35112421153).

The spelling of 33100221020 in words is "thirty-three billion, one hundred million, two hundred twenty-one thousand, twenty".