127213001 has 2 divisors, whose sum is σ = 127213002. Its totient is φ = 127213000.

The previous prime is 127212983. The next prime is 127213003. The reversal of 127213001 is 100312721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86508601 + 40704400 = 9301^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 127213001 - 2²⁶ = 60104137 is a prime.

Together with 127213003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127213003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63606500 + 63606501.

It is an arithmetic number, because the mean of its divisors is an integer number (63606501).

Almost surely, 2^127213001 is an apocalyptic number.

It is an amenable number.

127213001 is a deficient number, since it is larger than the sum of its proper divisors (1).

127213001 is an equidigital number, since it uses as much as digits as its factorization.

127213001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 127213001 is about 11278.8741016114. The cubic root of 127213001 is about 502.9334243867.

Adding to 127213001 its reverse (100312721), we get a palindrome (227525722).

The spelling of 127213001 in words is "one hundred twenty-seven million, two hundred thirteen thousand, one".