111101212131 has 64 divisors (see below), whose sum is σ = 188506752000. Its totient is φ = 56635531776.

The previous prime is 111101212111. The next prime is 111101212133. The reversal of 111101212131 is 131212101111.

It is not a de Polignac number, because 111101212131 - 2¹⁴ = 111101195747 is a prime.

It is a super-2 number, since 2×111101212131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111101212131.

It is not an unprimeable number, because it can be changed into a prime (111101212133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1468140 + ... + 1541958.

It is an arithmetic number, because the mean of its divisors is an integer number (2945418000).

Almost surely, 2^111101212131 is an apocalyptic number.

111101212131 is a deficient number, since it is larger than the sum of its proper divisors (77405539869).

111101212131 is a wasteful number, since it uses less digits than its factorization.

111101212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74028.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 111101212131 its reverse (131212101111), we get a palindrome (242313313242).

The spelling of 111101212131 in words is "one hundred eleven billion, one hundred one million, two hundred twelve thousand, one hundred thirty-one".