212110120121 has 2 divisors, whose sum is σ = 212110120122. Its totient is φ = 212110120120.

The previous prime is 212110120087. The next prime is 212110120129. The reversal of 212110120121 is 121021011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211213776400 + 896343721 = 459580^2 + 29939^2 .

It is a cyclic number.

It is not a de Polignac number, because 212110120121 - 2¹⁸ = 212109857977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212110120096 and 212110120105.

It is not a weakly prime, because it can be changed into another prime (212110120129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055060060 + 106055060061.

It is an arithmetic number, because the mean of its divisors is an integer number (106055060061).

Almost surely, 2^212110120121 is an apocalyptic number.

It is an amenable number.

212110120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212110120121 is an equidigital number, since it uses as much as digits as its factorization.

212110120121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 212110120121 its reverse (121021011212), we get a palindrome (333131131333).

The spelling of 212110120121 in words is "two hundred twelve billion, one hundred ten million, one hundred twenty thousand, one hundred twenty-one".