221021000201137 has 2 divisors, whose sum is σ = 221021000201138. Its totient is φ = 221021000201136.

The previous prime is 221021000201107. The next prime is 221021000201161. The reversal of 221021000201137 is 731102000120122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155696715666801 + 65324284534336 = 12477849^2 + 8082344^2 .

It is a cyclic number.

It is not a de Polignac number, because 221021000201137 - 2⁷ = 221021000201009 is a prime.

It is a super-2 number, since 2×221021000201137² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221021000201107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510500100568 + 110510500100569.

It is an arithmetic number, because the mean of its divisors is an integer number (110510500100569).

Almost surely, 2^{221021000201137} is an apocalyptic number.

It is an amenable number.

221021000201137 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021000201137 is an equidigital number, since it uses as much as digits as its factorization.

221021000201137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 221021000201137 its reverse (731102000120122), we get a palindrome (952123000321259).

The spelling of 221021000201137 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred one thousand, one hundred thirty-seven".