311120221020 has 48 divisors (see below), whose sum is σ = 995584708608. Its totient is φ = 71113193280.

The previous prime is 311120220979. The next prime is 311120221031. The reversal of 311120221020 is 20122021113.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 370380796 + ... + 370381635.

It is an arithmetic number, because the mean of its divisors is an integer number (20741348096).

Almost surely, 2^311120221020 is an apocalyptic number.

311120221020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311120221020 is an abundant number, since it is smaller than the sum of its proper divisors (684464487588).

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

311120221020 is a wasteful number, since it uses less digits than its factorization.

311120221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740762450 (or 740762448 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 311120221020 its reverse (20122021113), we get a palindrome (331242242133).

The spelling of 311120221020 in words is "three hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, twenty".