111021201 has 12 divisors (see below), whose sum is σ = 164698612. Its totient is φ = 72013536.

The previous prime is 111021151. The next prime is 111021223. The reversal of 111021201 is 102120111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 55130625 = 7476^2 + 7425^2 .

It is not a de Polignac number, because 111021201 - 2¹⁰ = 111020177 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 (111021401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166366 + ... + 167031.

Almost surely, 2^111021201 is an apocalyptic number.

It is an amenable number.

111021201 is a deficient number, since it is larger than the sum of its proper divisors (53677411).

111021201 is a wasteful number, since it uses less digits than its factorization.

111021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333440 (or 333437 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 111021201 is about 10536.6598597468. The cubic root of 111021201 is about 480.6201489576.

Adding to 111021201 its reverse (102120111), we get a palindrome (213141312).

It can be divided in two parts, 11 and 1021201, that multiplied together give a palindrome (11233211).

The spelling of 111021201 in words is "one hundred eleven million, twenty-one thousand, two hundred one".