311212002000 has 80 divisors (see below), whose sum is σ = 1003347513792. Its totient is φ = 82989865600.

The previous prime is 311212001977. The next prime is 311212002029. The reversal of 311212002000 is 200212113.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25928334 + ... + 25940333.

Almost surely, 2^311212002000 is an apocalyptic number.

311212002000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311212002000 is an abundant number, since it is smaller than the sum of its proper divisors (692135511792).

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

311212002000 is a wasteful number, since it uses less digits than its factorization.

311212002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51868693 (or 51868677 counting only the distinct ones).

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

Adding to 311212002000 its reverse (200212113), we get a palindrome (311412214113).

The spelling of 311212002000 in words is "three hundred eleven billion, two hundred twelve million, two thousand".