33011212120020 has 144 divisors (see below), whose sum is σ = 106026726012480. Its totient is φ = 8284973165568.

The previous prime is 33011212119973. The next prime is 33011212120021. The reversal of 33011212120020 is 2002121211033.

33011212120020 is a `hidden beast` number, since 3 + 301 + 121 + 21 + 200 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 33011212119975 and 33011212120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33011212120021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166790439 + ... + 166988241.

It is an arithmetic number, because the mean of its divisors is an integer number (736296708420).

Almost surely, 2^{33011212120020} is an apocalyptic number.

33011212120020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33011212120020 is an abundant number, since it is smaller than the sum of its proper divisors (73015513892460).

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

33011212120020 is a wasteful number, since it uses less digits than its factorization.

33011212120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252374 (or 252369 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 33011212120020 its reverse (2002121211033), we get a palindrome (35013333331053).

The spelling of 33011212120020 in words is "thirty-three trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, twenty".