111011211111201 has 4 divisors (see below), whose sum is σ = 148014948148272. Its totient is φ = 74007474074132.

The previous prime is 111011211111149. The next prime is 111011211111221. The reversal of 111011211111201 is 102111112110111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111011211111201 - 2¹⁵ = 111011211078433 is a prime.

It is a super-2 number, since 2×111011211111201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111011211111221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18501868518531 + ... + 18501868518536.

It is an arithmetic number, because the mean of its divisors is an integer number (37003737037068).

Almost surely, 2^{111011211111201} is an apocalyptic number.

It is an amenable number.

111011211111201 is a deficient number, since it is larger than the sum of its proper divisors (37003737037071).

111011211111201 is an equidigital number, since it uses as much as digits as its factorization.

111011211111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37003737037070.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111011211111201 its reverse (102111112110111), we get a palindrome (213122323221312).

The spelling of 111011211111201 in words is "one hundred eleven trillion, eleven billion, two hundred eleven million, one hundred eleven thousand, two hundred one".