212010121121 has 2 divisors, whose sum is σ = 212010121122. Its totient is φ = 212010121120.

The previous prime is 212010121067. The next prime is 212010121123. The reversal of 212010121121 is 121121010212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156167232400 + 55842888721 = 395180^2 + 236311^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010121121 - 2¹⁴ = 212010104737 is a prime.

Together with 212010121123, 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 = 212010121096 and 212010121105.

It is not a weakly prime, because it can be changed into another prime (212010121123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005060560 + 106005060561.

It is an arithmetic number, because the mean of its divisors is an integer number (106005060561).

Almost surely, 2^212010121121 is an apocalyptic number.

It is an amenable number.

212010121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010121121 is an equidigital number, since it uses as much as digits as its factorization.

212010121121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212010121121 its reverse (121121010212), we get a palindrome (333131131333).

The spelling of 212010121121 in words is "two hundred twelve billion, ten million, one hundred twenty-one thousand, one hundred twenty-one".