111110022012221 has 4 divisors (see below), whose sum is σ = 111110269357500. Its totient is φ = 111109774666944.

The previous prime is 111110022012217. The next prime is 111110022012271. The reversal of 111110022012221 is 122210220011111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23372873702500 + 87737148309721 = 4834550^2 + 9366811^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110022012221 - 2² = 111110022012217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111110022012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110022012271) 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, 122997596 + ... + 123897653.

It is an arithmetic number, because the mean of its divisors is an integer number (27777567339375).

Almost surely, 2^{111110022012221} is an apocalyptic number.

It is an amenable number.

111110022012221 is a deficient number, since it is larger than the sum of its proper divisors (247345279).

111110022012221 is an equidigital number, since it uses as much as digits as its factorization.

111110022012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247345278.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111110022012221 its reverse (122210220011111), we get a palindrome (233320242023332).

The spelling of 111110022012221 in words is "one hundred eleven trillion, one hundred ten billion, twenty-two million, twelve thousand, two hundred twenty-one".