20120112877 has 2 divisors, whose sum is σ = 20120112878. Its totient is φ = 20120112876.

The previous prime is 20120112847. The next prime is 20120112899. The reversal of 20120112877 is 77821102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15250027081 + 4870085796 = 123491^2 + 69786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120112877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120112847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060056438 + 10060056439.

It is an arithmetic number, because the mean of its divisors is an integer number (10060056439).

Almost surely, 2^20120112877 is an apocalyptic number.

It is an amenable number.

20120112877 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120112877 is an equidigital number, since it uses as much as digits as its factorization.

20120112877 is an evil number, because the sum of its binary digits is even.

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

Adding to 20120112877 its reverse (77821102102), we get a palindrome (97941214979).

The spelling of 20120112877 in words is "twenty billion, one hundred twenty million, one hundred twelve thousand, eight hundred seventy-seven".