6212123881 has 2 divisors, whose sum is σ = 6212123882. Its totient is φ = 6212123880.

The previous prime is 6212123873. The next prime is 6212123887. The reversal of 6212123881 is 1883212126.

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., 6117742656 + 94381225 = 78216^2 + 9715^2 .

It is a cyclic number.

It is not a de Polignac number, because 6212123881 - 2³ = 6212123873 is a prime.

It is a super-2 number, since 2×6212123881² = 77180966225781004322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6212123887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3106061940 + 3106061941.

It is an arithmetic number, because the mean of its divisors is an integer number (3106061941).

Almost surely, 2^6212123881 is an apocalyptic number.

It is an amenable number.

6212123881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6212123881 is an equidigital number, since it uses as much as digits as its factorization.

6212123881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 6212123881 is about 78817.0278620045. The cubic root of 6212123881 is about 1838.2872255605.

The spelling of 6212123881 in words is "six billion, two hundred twelve million, one hundred twenty-three thousand, eight hundred eighty-one".