20100120221197 has 2 divisors, whose sum is σ = 20100120221198. Its totient is φ = 20100120221196.

The previous prime is 20100120221189. The next prime is 20100120221227. The reversal of 20100120221197 is 79112202100102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16458973125156 + 3641147096041 = 4056966^2 + 1908179^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100120221197 - 2³ = 20100120221189 is a prime.

It is a super-2 number, since 2×20100120221197² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100120221177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050060110598 + 10050060110599.

It is an arithmetic number, because the mean of its divisors is an integer number (10050060110599).

Almost surely, 2^{20100120221197} is an apocalyptic number.

It is an amenable number.

20100120221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100120221197 is an equidigital number, since it uses as much as digits as its factorization.

20100120221197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 20100120221197 its reverse (79112202100102), we get a palindrome (99212322321299).

The spelling of 20100120221197 in words is "twenty trillion, one hundred billion, one hundred twenty million, two hundred twenty-one thousand, one hundred ninety-seven".