311121423 has 12 divisors (see below), whose sum is σ = 449702760. Its totient is φ = 207273456.

The previous prime is 311121413. The next prime is 311121449. The reversal of 311121423 is 324121113.

It is not a de Polignac number, because 311121423 - 2⁶ = 311121359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311121396 and 311121405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3265 + ... + 25157.

It is an arithmetic number, because the mean of its divisors is an integer number (37475230).

Almost surely, 2^311121423 is an apocalyptic number.

311121423 is a deficient number, since it is larger than the sum of its proper divisors (138581337).

311121423 is a wasteful number, since it uses less digits than its factorization.

311121423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23478 (or 23475 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311121423 is about 17638.6343859155. The cubic root of 311121423 is about 677.6050575317.

Adding to 311121423 its reverse (324121113), we get a palindrome (635242536).

The spelling of 311121423 in words is "three hundred eleven million, one hundred twenty-one thousand, four hundred twenty-three".