121109279 has 2 divisors, whose sum is σ = 121109280. Its totient is φ = 121109278.

The previous prime is 121109273. The next prime is 121109297. The reversal of 121109279 is 972901121.

Together with next prime (121109297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (972901121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121109279 - 2¹⁶ = 121043743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121109273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60554639 + 60554640.

It is an arithmetic number, because the mean of its divisors is an integer number (60554640).

Almost surely, 2^121109279 is an apocalyptic number.

121109279 is a deficient number, since it is larger than the sum of its proper divisors (1).

121109279 is an equidigital number, since it uses as much as digits as its factorization.

121109279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 121109279 is about 11004.9661062631. The cubic root of 121109279 is about 494.7575985552.

The spelling of 121109279 in words is "one hundred twenty-one million, one hundred nine thousand, two hundred seventy-nine".