23213521121017 has 2 divisors, whose sum is σ = 23213521121018. Its totient is φ = 23213521121016.

The previous prime is 23213521121009. The next prime is 23213521121027. The reversal of 23213521121017 is 71012112531232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17907081768976 + 5306439352041 = 4231676^2 + 2303571^2 .

It is a cyclic number.

It is not a de Polignac number, because 23213521121017 - 2³ = 23213521121009 is a prime.

It is a super-2 number, since 2×23213521121017² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23213521121017.

It is not a weakly prime, because it can be changed into another prime (23213521121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606760560508 + 11606760560509.

It is an arithmetic number, because the mean of its divisors is an integer number (11606760560509).

Almost surely, 2^{23213521121017} is an apocalyptic number.

It is an amenable number.

23213521121017 is a deficient number, since it is larger than the sum of its proper divisors (1).

23213521121017 is an equidigital number, since it uses as much as digits as its factorization.

23213521121017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 23213521121017 its reverse (71012112531232), we get a palindrome (94225633652249).

The spelling of 23213521121017 in words is "twenty-three trillion, two hundred thirteen billion, five hundred twenty-one million, one hundred twenty-one thousand, seventeen".