111512214221 has 8 divisors (see below), whose sum is σ = 118075798080. Its totient is φ = 104949079488.

The previous prime is 111512214181. The next prime is 111512214259. The reversal of 111512214221 is 122412215111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111512214221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111512214721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491810 + ... + 681836.

It is an arithmetic number, because the mean of its divisors is an integer number (14759474760).

Almost surely, 2^111512214221 is an apocalyptic number.

It is an amenable number.

111512214221 is a deficient number, since it is larger than the sum of its proper divisors (6563583859).

111512214221 is a wasteful number, since it uses less digits than its factorization.

111512214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224563.

The product of its digits is 320, while the sum is 23.

Adding to 111512214221 its reverse (122412215111), we get a palindrome (233924429332).

The spelling of 111512214221 in words is "one hundred eleven billion, five hundred twelve million, two hundred fourteen thousand, two hundred twenty-one".