33011221140 has 120 divisors (see below), whose sum is σ = 103697376552. Its totient is φ = 8791096320.

The previous prime is 33011221121. The next prime is 33011221147. The reversal of 33011221140 is 4112211033.

33011221140 is a `hidden beast` number, since 3 + 301 + 1 + 221 + 140 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1900611216 + 31110609924 = 43596^2 + 176382^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33011221147) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1219432 + ... + 1246208.

Almost surely, 2^33011221140 is an apocalyptic number.

33011221140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33011221140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51848688276).

33011221140 is an abundant number, since it is smaller than the sum of its proper divisors (70686155412).

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

33011221140 is a wasteful number, since it uses less digits than its factorization.

33011221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27559 (or 27548 counting only the distinct ones).

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

Adding to 33011221140 its reverse (4112211033), we get a palindrome (37123432173).

The spelling of 33011221140 in words is "thirty-three billion, eleven million, two hundred twenty-one thousand, one hundred forty".