121210213 has 2 divisors, whose sum is σ = 121210214. Its totient is φ = 121210212.

The previous prime is 121210183. The next prime is 121210231. The reversal of 121210213 is 312012121.

Together with next prime (121210231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100942209 + 20268004 = 10047^2 + 4502^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210213 - 2⁵ = 121210181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121210193 and 121210202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605106 + 60605107.

It is an arithmetic number, because the mean of its divisors is an integer number (60605107).

Almost surely, 2^121210213 is an apocalyptic number.

It is an amenable number.

121210213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210213 is an equidigital number, since it uses as much as digits as its factorization.

121210213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121210213 is about 11009.5509899360. The cubic root of 121210213 is about 494.8950061299.

Adding to 121210213 its reverse (312012121), we get a palindrome (433222334).

The spelling of 121210213 in words is "one hundred twenty-one million, two hundred ten thousand, two hundred thirteen".