311320020000 has 240 divisors, whose sum is σ = 1114029921312. Its totient is φ = 75471360000.

The previous prime is 311320019981. The next prime is 311320020029. The reversal of 311320020000 is 20023113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 424152 + ... + 895848.

Almost surely, 2^311320020000 is an apocalyptic number.

311320020000 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 311320020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557014960656).

311320020000 is an abundant number, since it is smaller than the sum of its proper divisors (802709901312).

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

311320020000 is a wasteful number, since it uses less digits than its factorization.

311320020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471741 (or 471718 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 311320020000 its reverse (20023113), we get a palindrome (311340043113).

The spelling of 311320020000 in words is "three hundred eleven billion, three hundred twenty million, twenty thousand".