20121333100217 has 2 divisors, whose sum is σ = 20121333100218. Its totient is φ = 20121333100216.

The previous prime is 20121333100177. The next prime is 20121333100301. The reversal of 20121333100217 is 71200133312102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18050508490921 + 2070824609296 = 4248589^2 + 1439036^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121333100217 - 2⁸ = 20121333099961 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121333102217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060666550108 + 10060666550109.

It is an arithmetic number, because the mean of its divisors is an integer number (10060666550109).

Almost surely, 2^{20121333100217} is an apocalyptic number.

It is an amenable number.

20121333100217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121333100217 is an equidigital number, since it uses as much as digits as its factorization.

20121333100217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 20121333100217 its reverse (71200133312102), we get a palindrome (91321466412319).

The spelling of 20121333100217 in words is "twenty trillion, one hundred twenty-one billion, three hundred thirty-three million, one hundred thousand, two hundred seventeen".