21002201222137 has 2 divisors, whose sum is σ = 21002201222138. Its totient is φ = 21002201222136.

The previous prime is 21002201222081. The next prime is 21002201222201. The reversal of 21002201222137 is 73122210220012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19919225905216 + 1082975316921 = 4463096^2 + 1040661^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002201222137 - 2²⁷ = 21002067004409 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002201222537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501100611068 + 10501100611069.

It is an arithmetic number, because the mean of its divisors is an integer number (10501100611069).

Almost surely, 2^{21002201222137} is an apocalyptic number.

It is an amenable number.

21002201222137 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002201222137 is an equidigital number, since it uses as much as digits as its factorization.

21002201222137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21002201222137 its reverse (73122210220012), we get a palindrome (94124411442149).

The spelling of 21002201222137 in words is "twenty-one trillion, two billion, two hundred one million, two hundred twenty-two thousand, one hundred thirty-seven".