212030215121 has 2 divisors, whose sum is σ = 212030215122. Its totient is φ = 212030215120.

The previous prime is 212030215093. The next prime is 212030215123. The reversal of 212030215121 is 121512030212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206865780625 + 5164434496 = 454825^2 + 71864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212030215121 is a prime.

Together with 212030215123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212030215093 and 212030215102.

It is not a weakly prime, because it can be changed into another prime (212030215123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015107560 + 106015107561.

It is an arithmetic number, because the mean of its divisors is an integer number (106015107561).

Almost surely, 2^212030215121 is an apocalyptic number.

It is an amenable number.

212030215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212030215121 is an equidigital number, since it uses as much as digits as its factorization.

212030215121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 212030215121 its reverse (121512030212), we get a palindrome (333542245333).

The spelling of 212030215121 in words is "two hundred twelve billion, thirty million, two hundred fifteen thousand, one hundred twenty-one".