200221220137 has 2 divisors, whose sum is σ = 200221220138. Its totient is φ = 200221220136.

The previous prime is 200221220119. The next prime is 200221220141. The reversal of 200221220137 is 731022122002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194908122256 + 5313097881 = 441484^2 + 72891^2 .

It is a cyclic number.

It is not a de Polignac number, because 200221220137 - 2²³ = 200212831529 is a prime.

It is not a weakly prime, because it can be changed into another prime (200221250137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110610068 + 100110610069.

It is an arithmetic number, because the mean of its divisors is an integer number (100110610069).

Almost surely, 2^200221220137 is an apocalyptic number.

It is an amenable number.

200221220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221220137 is an equidigital number, since it uses as much as digits as its factorization.

200221220137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 200221220137 its reverse (731022122002), we get a palindrome (931243342139).

The spelling of 200221220137 in words is "two hundred billion, two hundred twenty-one million, two hundred twenty thousand, one hundred thirty-seven".