311332021123 has 4 divisors (see below), whose sum is σ = 318572300728. Its totient is φ = 304091741520.

The previous prime is 311332021109. The next prime is 311332021129. The reversal of 311332021123 is 321120233113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311332021123 - 2²⁵ = 311298466691 is a prime.

It is a super-2 number, since 2×311332021123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311332021094 and 311332021103.

It is not an unprimeable number, because it can be changed into a prime (311332021129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3620139738 + ... + 3620139823.

It is an arithmetic number, because the mean of its divisors is an integer number (79643075182).

Almost surely, 2^311332021123 is an apocalyptic number.

311332021123 is a deficient number, since it is larger than the sum of its proper divisors (7240279605).

311332021123 is an equidigital number, since it uses as much as digits as its factorization.

311332021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7240279604.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311332021123 its reverse (321120233113), we get a palindrome (632452254236).

The spelling of 311332021123 in words is "three hundred eleven billion, three hundred thirty-two million, twenty-one thousand, one hundred twenty-three".