22000022111261 has 2 divisors, whose sum is σ = 22000022111262. Its totient is φ = 22000022111260.

The previous prime is 22000022111173. The next prime is 22000022111341. The reversal of 22000022111261 is 16211122000022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21904552852900 + 95469258361 = 4680230^2 + 308981^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000022111261 - 2²² = 22000017916957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000022119261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000011055630 + 11000011055631.

It is an arithmetic number, because the mean of its divisors is an integer number (11000011055631).

Almost surely, 2^{22000022111261} is an apocalyptic number.

It is an amenable number.

22000022111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000022111261 is an equidigital number, since it uses as much as digits as its factorization.

22000022111261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 22000022111261 its reverse (16211122000022), we get a palindrome (38211144111283).

The spelling of 22000022111261 in words is "twenty-two trillion, twenty-two million, one hundred eleven thousand, two hundred sixty-one".