111212052 has 48 divisors (see below), whose sum is σ = 299644800. Its totient is φ = 31444992.

The previous prime is 111212051. The next prime is 111212053. The reversal of 111212052 is 250212111.

It is an interprime number because it is at equal distance from previous prime (111212051) and next prime (111212053).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1324 + ... + 14972.

It is an arithmetic number, because the mean of its divisors is an integer number (6242600).

Almost surely, 2^111212052 is an apocalyptic number.

111212052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111212052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149822400).

111212052 is an abundant number, since it is smaller than the sum of its proper divisors (188432748).

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

111212052 is a wasteful number, since it uses less digits than its factorization.

111212052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13760 (or 13758 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 111212052 is about 10545.7124937104. The cubic root of 111212052 is about 480.8953946595.

Adding to 111212052 its reverse (250212111), we get a palindrome (361424163).

The spelling of 111212052 in words is "one hundred eleven million, two hundred twelve thousand, fifty-two".