71212421153 has 2 divisors, whose sum is σ = 71212421154. Its totient is φ = 71212421152.

The previous prime is 71212421101. The next prime is 71212421183. The reversal of 71212421153 is 35112421217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69091173904 + 2121247249 = 262852^2 + 46057^2 .

It is a cyclic number.

It is not a de Polignac number, because 71212421153 - 2¹⁰ = 71212420129 is a prime.

It is not a weakly prime, because it can be changed into another prime (71212421183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35606210576 + 35606210577.

It is an arithmetic number, because the mean of its divisors is an integer number (35606210577).

Almost surely, 2^71212421153 is an apocalyptic number.

It is an amenable number.

71212421153 is a deficient number, since it is larger than the sum of its proper divisors (1).

71212421153 is an equidigital number, since it uses as much as digits as its factorization.

71212421153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The spelling of 71212421153 in words is "seventy-one billion, two hundred twelve million, four hundred twenty-one thousand, one hundred fifty-three".