221111120221110 has 160 divisors (see below), whose sum is σ = 682892447846400. Its totient is φ = 50285716100928.

The previous prime is 221111120221093. The next prime is 221111120221129. The reversal of 221111120221110 is 11122021111122.

It is a happy number.

221111120221110 is a `hidden beast` number, since 2 + 211 + 1 + 1 + 120 + 221 + 110 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 96853254 + ... + 99109913.

It is an arithmetic number, because the mean of its divisors is an integer number (4268077799040).

Almost surely, 2^{221111120221110} is an apocalyptic number.

221111120221110 is an abundant number, since it is smaller than the sum of its proper divisors (461781327625290).

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

221111120221110 is a wasteful number, since it uses less digits than its factorization.

221111120221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195963392 (or 195963383 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221111120221110 its reverse (11122021111122), we get a palindrome (232233141332232).

The spelling of 221111120221110 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, one hundred ten".