311231011101020 has 48 divisors (see below), whose sum is σ = 662806113778368. Its totient is φ = 122736107665920.

The previous prime is 311231011101011. The next prime is 311231011101047. The reversal of 311231011101020 is 20101110132113.

It is a super-3 number, since 3×311231011101020³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311231011101020.

It is a congruent number.

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, 58418234 + ... + 63522846.

It is an arithmetic number, because the mean of its divisors is an integer number (13808460703716).

Almost surely, 2^{311231011101020} is an apocalyptic number.

It is an amenable number.

311231011101020 is an abundant number, since it is smaller than the sum of its proper divisors (351575102677348).

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

311231011101020 is a wasteful number, since it uses less digits than its factorization.

311231011101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147630 (or 5147628 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 311231011101020 its reverse (20101110132113), we get a palindrome (331332121233133).

The spelling of 311231011101020 in words is "three hundred eleven trillion, two hundred thirty-one billion, eleven million, one hundred one thousand, twenty".