20120112277 has 2 divisors, whose sum is σ = 20120112278. Its totient is φ = 20120112276.

The previous prime is 20120112211. The next prime is 20120112281. The reversal of 20120112277 is 77221102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11821995441 + 8298116836 = 108729^2 + 91094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120112277 is a prime.

It is a super-2 number, since 2×20120112277² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120112877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060056138 + 10060056139.

It is an arithmetic number, because the mean of its divisors is an integer number (10060056139).

Almost surely, 2^20120112277 is an apocalyptic number.

It is an amenable number.

20120112277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120112277 is an equidigital number, since it uses as much as digits as its factorization.

20120112277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 20120112277 its reverse (77221102102), we get a palindrome (97341214379).

The spelling of 20120112277 in words is "twenty billion, one hundred twenty million, one hundred twelve thousand, two hundred seventy-seven".