111212231109 has 32 divisors (see below), whose sum is σ = 175455141120. Its totient is φ = 61307645952.

The previous prime is 111212231107. The next prime is 111212231111. The reversal of 111212231109 is 901132212111.

It is an interprime number because it is at equal distance from previous prime (111212231107) and next prime (111212231111).

It is not a de Polignac number, because 111212231109 - 2¹ = 111212231107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212231107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666127 + ... + 816179.

It is an arithmetic number, because the mean of its divisors is an integer number (5482973160).

Almost surely, 2^111212231109 is an apocalyptic number.

It is an amenable number.

111212231109 is a deficient number, since it is larger than the sum of its proper divisors (64242910011).

111212231109 is a wasteful number, since it uses less digits than its factorization.

111212231109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151309.

The product of its (nonzero) digits is 216, while the sum is 24.

The spelling of 111212231109 in words is "one hundred eleven billion, two hundred twelve million, two hundred thirty-one thousand, one hundred nine".