110111110021221 has 16 divisors (see below), whose sum is σ = 148709675150400. Its totient is φ = 72463866674688.

The previous prime is 110111110021163. The next prime is 110111110021261. The reversal of 110111110021221 is 122120011111011.

It is not a de Polignac number, because 110111110021221 - 2¹³ = 110111110013029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 110111110021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111110021261) 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, 486247591 + ... + 486473988.

It is an arithmetic number, because the mean of its divisors is an integer number (9294354696900).

Almost surely, 2^{110111110021221} is an apocalyptic number.

It is an amenable number.

110111110021221 is a deficient number, since it is larger than the sum of its proper divisors (38598565129179).

110111110021221 is an equidigital number, since it uses as much as digits as its factorization.

110111110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972722068.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 110111110021221 its reverse (122120011111011), we get a palindrome (232231121132232).

The spelling of 110111110021221 in words is "one hundred ten trillion, one hundred eleven billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".