71122020187 has 2 divisors, whose sum is σ = 71122020188. Its totient is φ = 71122020186.

The previous prime is 71122020173. The next prime is 71122020239. The reversal of 71122020187 is 78102022117.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71122020187 is a prime.

It is a super-3 number, since 3×71122020187³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71122020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35561010093 + 35561010094.

It is an arithmetic number, because the mean of its divisors is an integer number (35561010094).

Almost surely, 2^71122020187 is an apocalyptic number.

71122020187 is a deficient number, since it is larger than the sum of its proper divisors (1).

71122020187 is an equidigital number, since it uses as much as digits as its factorization.

71122020187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 31.

The spelling of 71122020187 in words is "seventy-one billion, one hundred twenty-two million, twenty thousand, one hundred eighty-seven".