11222211605161 has 2 divisors, whose sum is σ = 11222211605162. Its totient is φ = 11222211605160.

The previous prime is 11222211605153. The next prime is 11222211605167. The reversal of 11222211605161 is 16150611222211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7715861729536 + 3506349875625 = 2777744^2 + 1872525^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222211605161 - 2³ = 11222211605153 is a prime.

It is a super-2 number, since 2×11222211605161² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11222211605167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611105802580 + 5611105802581.

It is an arithmetic number, because the mean of its divisors is an integer number (5611105802581).

Almost surely, 2^{11222211605161} is an apocalyptic number.

It is an amenable number.

11222211605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222211605161 is an equidigital number, since it uses as much as digits as its factorization.

11222211605161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 31.

Adding to 11222211605161 its reverse (16150611222211), we get a palindrome (27372822827372).

The spelling of 11222211605161 in words is "eleven trillion, two hundred twenty-two billion, two hundred eleven million, six hundred five thousand, one hundred sixty-one".