33012131240 has 64 divisors (see below), whose sum is σ = 81068938560. Its totient is φ = 11998609920.

The previous prime is 33012131221. The next prime is 33012131279. The reversal of 33012131240 is 4213121033.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952292 + ... + 986348.

It is an arithmetic number, because the mean of its divisors is an integer number (1266702165).

Almost surely, 2^33012131240 is an apocalyptic number.

It is an amenable number.

33012131240 is an abundant number, since it is smaller than the sum of its proper divisors (48056807320).

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

33012131240 is a wasteful number, since it uses less digits than its factorization.

33012131240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36282 (or 36278 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33012131240 its reverse (4213121033), we get a palindrome (37225252273).

The spelling of 33012131240 in words is "thirty-three billion, twelve million, one hundred thirty-one thousand, two hundred forty".