71181885101 has 2 divisors, whose sum is σ = 71181885102. Its totient is φ = 71181885100.

The previous prime is 71181885097. The next prime is 71181885113. The reversal of 71181885101 is 10158818117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68448163876 + 2733721225 = 261626^2 + 52285^2 .

It is a cyclic number.

It is not a de Polignac number, because 71181885101 - 2² = 71181885097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71181885191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35590942550 + 35590942551.

It is an arithmetic number, because the mean of its divisors is an integer number (35590942551).

Almost surely, 2^71181885101 is an apocalyptic number.

It is an amenable number.

71181885101 is a deficient number, since it is larger than the sum of its proper divisors (1).

71181885101 is an equidigital number, since it uses as much as digits as its factorization.

71181885101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 41.

The spelling of 71181885101 in words is "seventy-one billion, one hundred eighty-one million, eight hundred eighty-five thousand, one hundred one".