20122231277 has 2 divisors, whose sum is σ = 20122231278. Its totient is φ = 20122231276.

The previous prime is 20122231211. The next prime is 20122231291. The reversal of 20122231277 is 77213222102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19018064836 + 1104166441 = 137906^2 + 33229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122231277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122231477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061115638 + 10061115639.

It is an arithmetic number, because the mean of its divisors is an integer number (10061115639).

Almost surely, 2^20122231277 is an apocalyptic number.

It is an amenable number.

20122231277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122231277 is an equidigital number, since it uses as much as digits as its factorization.

20122231277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 20122231277 its reverse (77213222102), we get a palindrome (97335453379).

The spelling of 20122231277 in words is "twenty billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred seventy-seven".