2121361252279 has 2 divisors, whose sum is σ = 2121361252280. Its totient is φ = 2121361252278.

The previous prime is 2121361252243. The next prime is 2121361252327. The reversal of 2121361252279 is 9722521631212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121361252279 - 2¹⁷ = 2121361121207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121361252679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060680626139 + 1060680626140.

It is an arithmetic number, because the mean of its divisors is an integer number (1060680626140).

Almost surely, 2^{2121361252279} is an apocalyptic number.

2121361252279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121361252279 is an equidigital number, since it uses as much as digits as its factorization.

2121361252279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The spelling of 2121361252279 in words is "two trillion, one hundred twenty-one billion, three hundred sixty-one million, two hundred fifty-two thousand, two hundred seventy-nine".