3111421123 has 2 divisors, whose sum is σ = 3111421124. Its totient is φ = 3111421122.

The previous prime is 3111421121. The next prime is 3111421177. The reversal of 3111421123 is 3211241113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3111421123 - 2¹ = 3111421121 is a prime.

It is a super-2 number, since 2×3111421123² = 19361882809301162258, which contains 22 as substring.

Together with 3111421121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3111421123.

It is not a weakly prime, because it can be changed into another prime (3111421121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555710561 + 1555710562.

It is an arithmetic number, because the mean of its divisors is an integer number (1555710562).

Almost surely, 2^3111421123 is an apocalyptic number.

3111421123 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111421123 is an equidigital number, since it uses as much as digits as its factorization.

3111421123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 3111421123 is about 55780.1140461365. The cubic root of 3111421123 is about 1459.8882010783. Note that the first 3 decimals are identical.

Adding to 3111421123 its reverse (3211241113), we get a palindrome (6322662236).

The spelling of 3111421123 in words is "three billion, one hundred eleven million, four hundred twenty-one thousand, one hundred twenty-three".