127213811 has 2 divisors, whose sum is σ = 127213812. Its totient is φ = 127213810.

The previous prime is 127213789. The next prime is 127213817. The reversal of 127213811 is 118312721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127213811 - 2⁶ = 127213747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127213817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63606905 + 63606906.

It is an arithmetic number, because the mean of its divisors is an integer number (63606906).

Almost surely, 2^127213811 is an apocalyptic number.

127213811 is a deficient number, since it is larger than the sum of its proper divisors (1).

127213811 is an equidigital number, since it uses as much as digits as its factorization.

127213811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 26.

The square root of 127213811 is about 11278.9100093936. The cubic root of 127213811 is about 502.9344918227.

The spelling of 127213811 in words is "one hundred twenty-seven million, two hundred thirteen thousand, eight hundred eleven".