311121423000 has 192 divisors, whose sum is σ = 1052304458400. Its totient is φ = 82909382400.

The previous prime is 311121422939. The next prime is 311121423007. The reversal of 311121423000 is 324121113.

311121423000 is a `hidden beast` number, since 311 + 12 + 1 + 42 + 300 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311121423007) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 14200054 + ... + 14221946.

Almost surely, 2^311121423000 is an apocalyptic number.

311121423000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311121423000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526152229200).

311121423000 is an abundant number, since it is smaller than the sum of its proper divisors (741183035400).

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

311121423000 is a wasteful number, since it uses less digits than its factorization.

311121423000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23499 (or 23482 counting only the distinct ones).

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

Adding to 311121423000 its reverse (324121113), we get a palindrome (311445544113).

The spelling of 311121423000 in words is "three hundred eleven billion, one hundred twenty-one million, four hundred twenty-three thousand".