1221111110119 has 4 divisors (see below), whose sum is σ = 1239336649144. Its totient is φ = 1202885571096.

The previous prime is 1221111110071. The next prime is 1221111110123. The reversal of 1221111110119 is 9110111111221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221111110119 - 2¹⁹ = 1221110585831 is a prime.

It is a super-2 number, since 2×1221111110119² (a number of 25 digits) contains 22 as substring.

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 1221111110119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221111110719) 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, 9112769412 + ... + 9112769545.

It is an arithmetic number, because the mean of its divisors is an integer number (309834162286).

Almost surely, 2^{1221111110119} is an apocalyptic number.

1221111110119 is a deficient number, since it is larger than the sum of its proper divisors (18225539025).

1221111110119 is an equidigital number, since it uses as much as digits as its factorization.

1221111110119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18225539024.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 1221111110119 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, one hundred nineteen".