111000001211001 has 20 divisors (see below), whose sum is σ = 189502647571072. Its totient is φ = 63428572120248.

The previous prime is 111000001210999. The next prime is 111000001211083. The reversal of 111000001211001 is 100112100000111.

It is not a de Polignac number, because 111000001211001 - 2¹ = 111000001210999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111000001210001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97883598385 + ... + 97883599518.

Almost surely, 2^{111000001211001} is an apocalyptic number.

It is an amenable number.

111000001211001 is a deficient number, since it is larger than the sum of its proper divisors (78502646360071).

111000001211001 is an equidigital number, since it uses as much as digits as its factorization.

111000001211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195767197922 (or 195767197913 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111000001211001 its reverse (100112100000111), we get a palindrome (211112101211112).

The spelling of 111000001211001 in words is "one hundred eleven trillion, one million, two hundred eleven thousand, one".