33131121222 has 16 divisors (see below), whose sum is σ = 66264387840. Its totient is φ = 11043349512.

The previous prime is 33131121209. The next prime is 33131121223. The reversal of 33131121222 is 22212113133.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33131121223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168679 + ... + 307757.

It is an arithmetic number, because the mean of its divisors is an integer number (4141524240).

Almost surely, 2^33131121222 is an apocalyptic number.

33131121222 is an abundant number, since it is smaller than the sum of its proper divisors (33133266618).

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

33131121222 is a wasteful number, since it uses less digits than its factorization.

33131121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178787.

The product of its digits is 432, while the sum is 21.

Adding to 33131121222 its reverse (22212113133), we get a palindrome (55343234355).

The spelling of 33131121222 in words is "thirty-three billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-two".