20121122211277 has 2 divisors, whose sum is σ = 20121122211278. Its totient is φ = 20121122211276.

The previous prime is 20121122211227. The next prime is 20121122211313. The reversal of 20121122211277 is 77211222112102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19528497839236 + 592624372041 = 4419106^2 + 769821^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121122211277 - 2⁷ = 20121122211149 is a prime.

It is a super-2 number, since 2×20121122211277² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121122211227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060561105638 + 10060561105639.

It is an arithmetic number, because the mean of its divisors is an integer number (10060561105639).

Almost surely, 2^{20121122211277} is an apocalyptic number.

It is an amenable number.

20121122211277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121122211277 is an equidigital number, since it uses as much as digits as its factorization.

20121122211277 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.

Adding to 20121122211277 its reverse (77211222112102), we get a palindrome (97332344323379).

The spelling of 20121122211277 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred seventy-seven".