311020122 has 64 divisors (see below), whose sum is σ = 744597504. Its totient is φ = 84680640.

The previous prime is 311020109. The next prime is 311020141. The reversal of 311020122 is 221020113.

It is a junction number, because it is equal to n+sod(n) for n = 311020098 and 311020107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383097 + ... + 383907.

It is an arithmetic number, because the mean of its divisors is an integer number (11634336).

Almost surely, 2^311020122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311020122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372298752).

311020122 is an abundant number, since it is smaller than the sum of its proper divisors (433577382).

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

311020122 is a wasteful number, since it uses less digits than its factorization.

311020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 311020122 is about 17635.7625862904. The cubic root of 311020122 is about 677.5315069111.

Adding to 311020122 its reverse (221020113), we get a palindrome (532040235).

Subtracting from 311020122 its reverse (221020113), we obtain a palindrome (90000009).

It can be divided in two parts, 3110 and 20122, that added together give a palindrome (23232).

The spelling of 311020122 in words is "three hundred eleven million, twenty thousand, one hundred twenty-two".