111121222201 has 16 divisors (see below), whose sum is σ = 133151293440. Its totient is φ = 91541506320.

The previous prime is 111121222193. The next prime is 111121222213. The reversal of 111121222201 is 102222121111.

It is not a de Polignac number, because 111121222201 - 2³ = 111121222193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111121222501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11553465 + ... + 11563078.

It is an arithmetic number, because the mean of its divisors is an integer number (8321955840).

Almost surely, 2^111121222201 is an apocalyptic number.

111121222201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111121222201 is a deficient number, since it is larger than the sum of its proper divisors (22030071239).

111121222201 is a wasteful number, since it uses less digits than its factorization.

111121222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23116596.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111121222201 its reverse (102222121111), we get a palindrome (213343343312).

The spelling of 111121222201 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".