221200222200137 has 2 divisors, whose sum is σ = 221200222200138. Its totient is φ = 221200222200136.

The previous prime is 221200222200091. The next prime is 221200222200163. The reversal of 221200222200137 is 731002222002122.

It is an a-pointer prime, because the next prime (221200222200163) can be obtained adding 221200222200137 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214907067964681 + 6293154235456 = 14659709^2 + 2508616^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200222200137 - 2³⁰ = 221199148458313 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200222209137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600111100068 + 110600111100069.

It is an arithmetic number, because the mean of its divisors is an integer number (110600111100069).

Almost surely, 2^{221200222200137} is an apocalyptic number.

It is an amenable number.

221200222200137 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200222200137 is an equidigital number, since it uses as much as digits as its factorization.

221200222200137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 221200222200137 its reverse (731002222002122), we get a palindrome (952202444202259).

The spelling of 221200222200137 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, two hundred thousand, one hundred thirty-seven".