20111010222077 has 2 divisors, whose sum is σ = 20111010222078. Its totient is φ = 20111010222076.

The previous prime is 20111010222067. The next prime is 20111010222203. The reversal of 20111010222077 is 77022201011102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19538424412441 + 572585809636 = 4420229^2 + 756694^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111010222077 - 2¹⁰ = 20111010221053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111010222067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055505111038 + 10055505111039.

It is an arithmetic number, because the mean of its divisors is an integer number (10055505111039).

Almost surely, 2^{20111010222077} is an apocalyptic number.

It is an amenable number.

20111010222077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111010222077 is an equidigital number, since it uses as much as digits as its factorization.

20111010222077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 20111010222077 its reverse (77022201011102), we get a palindrome (97133211233179).

The spelling of 20111010222077 in words is "twenty trillion, one hundred eleven billion, ten million, two hundred twenty-two thousand, seventy-seven".