20120123071 has 2 divisors, whose sum is σ = 20120123072. Its totient is φ = 20120123070.

The previous prime is 20120122961. The next prime is 20120123113. The reversal of 20120123071 is 17032102102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20120123071 - 2⁹ = 20120122559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120121071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060061535 + 10060061536.

It is an arithmetic number, because the mean of its divisors is an integer number (10060061536).

Almost surely, 2^20120123071 is an apocalyptic number.

20120123071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120123071 is an equidigital number, since it uses as much as digits as its factorization.

20120123071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 20120123071 its reverse (17032102102), we get a palindrome (37152225173).

The spelling of 20120123071 in words is "twenty billion, one hundred twenty million, one hundred twenty-three thousand, seventy-one".