212021018017 has 2 divisors, whose sum is σ = 212021018018. Its totient is φ = 212021018016.

The previous prime is 212021017951. The next prime is 212021018021. The reversal of 212021018017 is 710810120212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208041805456 + 3979212561 = 456116^2 + 63081^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021018017 - 2¹⁵ = 212020985249 is a prime.

It is a super-2 number, since 2×212021018017² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021017982 and 212021018000.

It is not a weakly prime, because it can be changed into another prime (212021018317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010509008 + 106010509009.

It is an arithmetic number, because the mean of its divisors is an integer number (106010509009).

Almost surely, 2^212021018017 is an apocalyptic number.

It is an amenable number.

212021018017 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021018017 is an equidigital number, since it uses as much as digits as its factorization.

212021018017 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 25.

Adding to 212021018017 its reverse (710810120212), we get a palindrome (922831138229).

The spelling of 212021018017 in words is "two hundred twelve billion, twenty-one million, eighteen thousand, seventeen".