1220126069 has 2 divisors, whose sum is σ = 1220126070. Its totient is φ = 1220126068.

The previous prime is 1220126041. The next prime is 1220126071. The reversal of 1220126069 is 9606210221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 689745169 + 530380900 = 26263^2 + 23030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220126069 is a prime.

It is a super-2 number, since 2×1220126069² = 2977415248506785522, which contains 22 as substring.

Together with 1220126071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220126099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610063034 + 610063035.

It is an arithmetic number, because the mean of its divisors is an integer number (610063035).

Almost surely, 2^1220126069 is an apocalyptic number.

It is an amenable number.

1220126069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220126069 is an equidigital number, since it uses as much as digits as its factorization.

1220126069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1220126069 is about 34930.3030190120. The cubic root of 1220126069 is about 1068.5665344753.

The spelling of 1220126069 in words is "one billion, two hundred twenty million, one hundred twenty-six thousand, sixty-nine".