20210102212217 has 2 divisors, whose sum is σ = 20210102212218. Its totient is φ = 20210102212216.

The previous prime is 20210102212199. The next prime is 20210102212253. The reversal of 20210102212217 is 71221220101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14371408049296 + 5838694162921 = 3790964^2 + 2416339^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210102212217 - 2¹⁶ = 20210102146681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20210102212192 and 20210102212201.

It is not a weakly prime, because it can be changed into another prime (20210102112217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105051106108 + 10105051106109.

It is an arithmetic number, because the mean of its divisors is an integer number (10105051106109).

Almost surely, 2^{20210102212217} is an apocalyptic number.

It is an amenable number.

20210102212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210102212217 is an equidigital number, since it uses as much as digits as its factorization.

20210102212217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 20210102212217 its reverse (71221220101202), we get a palindrome (91431322313419).

The spelling of 20210102212217 in words is "twenty trillion, two hundred ten billion, one hundred two million, two hundred twelve thousand, two hundred seventeen".