220111021279 has 2 divisors, whose sum is σ = 220111021280. Its totient is φ = 220111021278.

The previous prime is 220111021183. The next prime is 220111021297. The reversal of 220111021279 is 972120111022.

Together with next prime (220111021297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111021279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220111021379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055510639 + 110055510640.

It is an arithmetic number, because the mean of its divisors is an integer number (110055510640).

Almost surely, 2^220111021279 is an apocalyptic number.

220111021279 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111021279 is an equidigital number, since it uses as much as digits as its factorization.

220111021279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

It can be divided in two parts, 22011 and 1021279, that added together give a triangular number (1043290 = T₁₄₄₄).

The spelling of 220111021279 in words is "two hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred seventy-nine".