111210001201221 has 32 divisors (see below), whose sum is σ = 171262212589440. Its totient is φ = 63611678916864.

The previous prime is 111210001201207. The next prime is 111210001201237. The reversal of 111210001201221 is 122102100012111.

It is a happy number.

It is not a de Polignac number, because 111210001201221 - 2⁶ = 111210001201157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111210001201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210001201021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1415818966 + ... + 1415897511.

It is an arithmetic number, because the mean of its divisors is an integer number (5351944143420).

Almost surely, 2^{111210001201221} is an apocalyptic number.

It is an amenable number.

111210001201221 is a deficient number, since it is larger than the sum of its proper divisors (60052211388219).

111210001201221 is a wasteful number, since it uses less digits than its factorization.

111210001201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831716565.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111210001201221 its reverse (122102100012111), we get a palindrome (233312101213332).

The spelling of 111210001201221 in words is "one hundred eleven trillion, two hundred ten billion, one million, two hundred one thousand, two hundred twenty-one".