111220221212201 has 4 divisors (see below), whose sum is σ = 111222072135504. Its totient is φ = 111218370288900.

The previous prime is 111220221212167. The next prime is 111220221212273. The reversal of 111220221212201 is 102212122022111.

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 111220221212201 - 2³⁸ = 110945343305257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220221212281) 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, 925371515 + ... + 925491696.

It is an arithmetic number, because the mean of its divisors is an integer number (27805518033876).

Almost surely, 2^{111220221212201} is an apocalyptic number.

It is an amenable number.

111220221212201 is a deficient number, since it is larger than the sum of its proper divisors (1850923303).

111220221212201 is an equidigital number, since it uses as much as digits as its factorization.

111220221212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850923302.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111220221212201 its reverse (102212122022111), we get a palindrome (213432343234312).

The spelling of 111220221212201 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twelve thousand, two hundred one".