201221202107 has 2 divisors, whose sum is σ = 201221202108. Its totient is φ = 201221202106.

The previous prime is 201221202043. The next prime is 201221202121. The reversal of 201221202107 is 701202122102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201221202107 - 2⁶ = 201221202043 is a prime.

It is a super-2 number, since 2×201221202107² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201221202407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610601053 + 100610601054.

It is an arithmetic number, because the mean of its divisors is an integer number (100610601054).

Almost surely, 2^201221202107 is an apocalyptic number.

201221202107 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221202107 is an equidigital number, since it uses as much as digits as its factorization.

201221202107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 201221202107 its reverse (701202122102), we get a palindrome (902423324209).

The spelling of 201221202107 in words is "two hundred one billion, two hundred twenty-one million, two hundred two thousand, one hundred seven".