111131010102 has 56 divisors (see below), whose sum is σ = 259307022456. Its totient is φ = 31751515488.

The previous prime is 111131010041. The next prime is 111131010103. The reversal of 111131010102 is 201010131111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131010103) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 627178 + ... + 784610.

Almost surely, 2^111131010102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111131010102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129653511228).

111131010102 is an abundant number, since it is smaller than the sum of its proper divisors (148176012354).

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

111131010102 is an frugal number, since it uses more digits than its factorization.

111131010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157480 (or 157445 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 111131010102 its reverse (201010131111), we get a palindrome (312141141213).

The spelling of 111131010102 in words is "one hundred eleven billion, one hundred thirty-one million, ten thousand, one hundred two".