111212122201 has 16 divisors (see below), whose sum is σ = 112686641424. Its totient is φ = 109750288384.

The previous prime is 111212122199. The next prime is 111212122247. The reversal of 111212122201 is 102221212111.

It can be written as a sum of positive squares in 8 ways, for example, as 85065555600 + 26146566601 = 291660^2 + 161699^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212122201 - 2¹ = 111212122199 is a prime.

It is a super-2 number, since 2×111212122201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212122501) 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, 13022805 + ... + 13031341.

It is an arithmetic number, because the mean of its divisors is an integer number (7042915089).

Almost surely, 2^111212122201 is an apocalyptic number.

It is an amenable number.

111212122201 is a deficient number, since it is larger than the sum of its proper divisors (1474519223).

111212122201 is a wasteful number, since it uses less digits than its factorization.

111212122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9260.

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

Adding to 111212122201 its reverse (102221212111), we get a palindrome (213433334312).

The spelling of 111212122201 in words is "one hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred one".