16121279 has 2 divisors, whose sum is σ = 16121280. Its totient is φ = 16121278.

The previous prime is 16121269. The next prime is 16121309. The reversal of 16121279 is 97212161.

It is a weak prime.

It is an emirp because it is prime and its reverse (97212161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16121279 - 2²⁰ = 15072703 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 (16121239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060639 + 8060640.

It is an arithmetic number, because the mean of its divisors is an integer number (8060640).

Almost surely, 2^16121279 is an apocalyptic number.

16121279 is a deficient number, since it is larger than the sum of its proper divisors (1).

16121279 is an equidigital number, since it uses as much as digits as its factorization.

16121279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 16121279 is about 4015.1312556379. The cubic root of 16121279 is about 252.6192829214.

The spelling of 16121279 in words is "sixteen million, one hundred twenty-one thousand, two hundred seventy-nine".