311121222102 has 80 divisors (see below), whose sum is σ = 705102723072. Its totient is φ = 102529534320.

The previous prime is 311121222101. The next prime is 311121222121. The reversal of 311121222102 is 201222121113.

311121222102 is a `hidden beast` number, since 311 + 121 + 22 + 210 + 2 = 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 (311121222101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5012703 + ... + 5074389.

Almost surely, 2^311121222102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311121222102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352551361536).

311121222102 is an abundant number, since it is smaller than the sum of its proper divisors (393981500970).

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

311121222102 is a wasteful number, since it uses less digits than its factorization.

311121222102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62055 (or 62046 counting only the distinct ones).

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

Adding to 311121222102 its reverse (201222121113), we get a palindrome (512343343215).

The spelling of 311121222102 in words is "three hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred two".