311201121222 has 48 divisors (see below), whose sum is σ = 684018466560. Its totient is φ = 102243772800.

The previous prime is 311201121173. The next prime is 311201121251. The reversal of 311201121222 is 222121102113.

311201121222 is a `hidden beast` number, since 311 + 20 + 112 + 1 + 222 = 666.

It is a super-2 number, since 2×311201121222² (a number of 24 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 311201121195 and 311201121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40479 + ... + 789962.

It is an arithmetic number, because the mean of its divisors is an integer number (14250384720).

Almost surely, 2^311201121222 is an apocalyptic number.

311201121222 is an abundant number, since it is smaller than the sum of its proper divisors (372817345338).

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

311201121222 is a wasteful number, since it uses less digits than its factorization.

311201121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830749 (or 830746 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 311201121222 its reverse (222121102113), we get a palindrome (533322223335).

The spelling of 311201121222 in words is "three hundred eleven billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty-two".