1216404127 has 2 divisors, whose sum is σ = 1216404128. Its totient is φ = 1216404126.

The previous prime is 1216404109. The next prime is 1216404131. The reversal of 1216404127 is 7214046121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216404127 - 2⁷ = 1216403999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216404095 and 1216404104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216401127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608202063 + 608202064.

It is an arithmetic number, because the mean of its divisors is an integer number (608202064).

Almost surely, 2^1216404127 is an apocalyptic number.

1216404127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216404127 is an equidigital number, since it uses as much as digits as its factorization.

1216404127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1216404127 is about 34876.9856352294. The cubic root of 1216404127 is about 1067.4788890625.

The spelling of 1216404127 in words is "one billion, two hundred sixteen million, four hundred four thousand, one hundred twenty-seven".