3111221203040 has 48 divisors (see below), whose sum is σ = 7603717348080. Its totient is φ = 1201575083520.

The previous prime is 3111221203039. The next prime is 3111221203043. The reversal of 3111221203040 is 403021221113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111221203043) 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, 335256266 + ... + 335265545.

It is an arithmetic number, because the mean of its divisors is an integer number (158410778085).

Almost surely, 2^{3111221203040} is an apocalyptic number.

It is an amenable number.

3111221203040 is an abundant number, since it is smaller than the sum of its proper divisors (4492496145040).

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

3111221203040 is a wasteful number, since it uses less digits than its factorization.

3111221203040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670521855 (or 670521847 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 3111221203040 its reverse (403021221113), we get a palindrome (3514242424153).

The spelling of 3111221203040 in words is "three trillion, one hundred eleven billion, two hundred twenty-one million, two hundred three thousand, forty".