10122211261 has 2 divisors, whose sum is σ = 10122211262. Its totient is φ = 10122211260.

The previous prime is 10122211237. The next prime is 10122211271. The reversal of 10122211261 is 16211222101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9953055225 + 169156036 = 99765^2 + 13006^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122211261 - 2²⁵ = 10088656829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10122211271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061105630 + 5061105631.

It is an arithmetic number, because the mean of its divisors is an integer number (5061105631).

Almost surely, 2^10122211261 is an apocalyptic number.

It is an amenable number.

10122211261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122211261 is an equidigital number, since it uses as much as digits as its factorization.

10122211261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 10122211261 its reverse (16211222101), we get a palindrome (26333433362).

The spelling of 10122211261 in words is "ten billion, one hundred twenty-two million, two hundred eleven thousand, two hundred sixty-one".