71900121331 has 2 divisors, whose sum is σ = 71900121332. Its totient is φ = 71900121330.

The previous prime is 71900121263. The next prime is 71900121367. The reversal of 71900121331 is 13312100917.

It is a strong prime.

It is an emirp because it is prime and its reverse (13312100917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71900121331 - 2²¹ = 71898024179 is a prime.

It is a super-2 number, since 2×71900121331² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71900121331.

It is not a weakly prime, because it can be changed into another prime (71900121431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35950060665 + 35950060666.

It is an arithmetic number, because the mean of its divisors is an integer number (35950060666).

Almost surely, 2^71900121331 is an apocalyptic number.

71900121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

71900121331 is an equidigital number, since it uses as much as digits as its factorization.

71900121331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The spelling of 71900121331 in words is "seventy-one billion, nine hundred million, one hundred twenty-one thousand, three hundred thirty-one".