111021211109 has 8 divisors (see below), whose sum is σ = 117555867288. Its totient is φ = 104486999040.

The previous prime is 111021211039. The next prime is 111021211123. The reversal of 111021211109 is 901112120111.

It can be written as a sum of positive squares in 4 ways, for example, as 1095808609 + 109925402500 = 33103^2 + 331550^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021211109 is a prime.

It is a super-2 number, since 2×111021211109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021211199) 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, 499679 + ... + 686819.

It is an arithmetic number, because the mean of its divisors is an integer number (14694483411).

Almost surely, 2^111021211109 is an apocalyptic number.

It is an amenable number.

111021211109 is a deficient number, since it is larger than the sum of its proper divisors (6534656179).

111021211109 is a wasteful number, since it uses less digits than its factorization.

111021211109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222055.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 111021211109 in words is "one hundred eleven billion, twenty-one million, two hundred eleven thousand, one hundred nine".