221111001121110 has 32 divisors (see below), whose sum is σ = 538140577381632. Its totient is φ = 58132469777760.

The previous prime is 221111001121081. The next prime is 221111001121177. The reversal of 221111001121110 is 11121100111122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 221111001121110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51903988744 + ... + 51903993003.

It is an arithmetic number, because the mean of its divisors is an integer number (16816893043176).

Almost surely, 2^{221111001121110} is an apocalyptic number.

221111001121110 is an abundant number, since it is smaller than the sum of its proper divisors (317029576260522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111001121110 is a wasteful number, since it uses less digits than its factorization.

221111001121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103807981828.

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

Adding to 221111001121110 its reverse (11121100111122), we get a palindrome (232232101232232).

The spelling of 221111001121110 in words is "two hundred twenty-one trillion, one hundred eleven billion, one million, one hundred twenty-one thousand, one hundred ten".