2211666223157 has 2 divisors, whose sum is σ = 2211666223158. Its totient is φ = 2211666223156.

The previous prime is 2211666223147. The next prime is 2211666223163. The reversal of 2211666223157 is 7513226661122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246686135601 + 964980087556 = 1116551^2 + 982334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211666223157 - 2¹⁶ = 2211666157621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211666223127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105833111578 + 1105833111579.

It is an arithmetic number, because the mean of its divisors is an integer number (1105833111579).

Almost surely, 2^{2211666223157} is an apocalyptic number.

It is an amenable number.

2211666223157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211666223157 is an equidigital number, since it uses as much as digits as its factorization.

2211666223157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The spelling of 2211666223157 in words is "two trillion, two hundred eleven billion, six hundred sixty-six million, two hundred twenty-three thousand, one hundred fifty-seven".