1220125279 has 2 divisors, whose sum is σ = 1220125280. Its totient is φ = 1220125278.

The previous prime is 1220125199. The next prime is 1220125303. The reversal of 1220125279 is 9725210221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220125279 - 2²⁹ = 683254367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220125279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220128279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610062639 + 610062640.

It is an arithmetic number, because the mean of its divisors is an integer number (610062640).

Almost surely, 2^1220125279 is an apocalyptic number.

1220125279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220125279 is an equidigital number, since it uses as much as digits as its factorization.

1220125279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1220125279 is about 34930.2917107773. The cubic root of 1220125279 is about 1068.5663038522.

The spelling of 1220125279 in words is "one billion, two hundred twenty million, one hundred twenty-five thousand, two hundred seventy-nine".