111321312102 has 96 divisors (see below), whose sum is σ = 323843869440. Its totient is φ = 26690420160.

The previous prime is 111321312101. The next prime is 111321312103. The reversal of 111321312102 is 201213123111.

It is an interprime number because it is at equal distance from previous prime (111321312101) and next prime (111321312103).

It is a super-2 number, since 2×111321312102² (a number of 23 digits) contains 22 as substring.

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 (111321312101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3071152 + ... + 3107187.

It is an arithmetic number, because the mean of its divisors is an integer number (3373373640).

Almost surely, 2^111321312102 is an apocalyptic number.

111321312102 is an abundant number, since it is smaller than the sum of its proper divisors (212522557338).

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

111321312102 is a wasteful number, since it uses less digits than its factorization.

111321312102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178378 (or 6178375 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111321312102 its reverse (201213123111), we get a palindrome (312534435213).

The spelling of 111321312102 in words is "one hundred eleven billion, three hundred twenty-one million, three hundred twelve thousand, one hundred two".