71212421207 has 2 divisors, whose sum is σ = 71212421208. Its totient is φ = 71212421206.

The previous prime is 71212421183. The next prime is 71212421251. The reversal of 71212421207 is 70212421217.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71212421207 - 2¹⁸ = 71212159063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71212421207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71212429207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35606210603 + 35606210604.

It is an arithmetic number, because the mean of its divisors is an integer number (35606210604).

Almost surely, 2^71212421207 is an apocalyptic number.

71212421207 is a deficient number, since it is larger than the sum of its proper divisors (1).

71212421207 is an equidigital number, since it uses as much as digits as its factorization.

71212421207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The spelling of 71212421207 in words is "seventy-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred seven".