111111010212122 has 8 divisors (see below), whose sum is σ = 166666717265076. Its totient is φ = 55555437790432.

The previous prime is 111111010212113. The next prime is 111111010212131. The reversal of 111111010212122 is 221212010111111.

It is an interprime number because it is at equal distance from previous prime (111111010212113) and next prime (111111010212131).

It can be written as a sum of positive squares in 2 ways, for example, as 110171872845841 + 939137366281 = 10496279^2 + 969091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111111010212122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31568633 + ... + 34911324.

Almost surely, 2^{111111010212122} is an apocalyptic number.

111111010212122 is a deficient number, since it is larger than the sum of its proper divisors (55555707052954).

111111010212122 is an equidigital number, since it uses as much as digits as its factorization.

111111010212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67315632.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111010212122 its reverse (221212010111111), we get a palindrome (332323020323233).

The spelling of 111111010212122 in words is "one hundred eleven trillion, one hundred eleven billion, ten million, two hundred twelve thousand, one hundred twenty-two".