212092121 has 2 divisors, whose sum is σ = 212092122. Its totient is φ = 212092120.

The previous prime is 212092093. The next prime is 212092147. The reversal of 212092121 is 121290212.

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., 154878025 + 57214096 = 12445^2 + 7564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212092121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212092093 and 212092102.

It is not a weakly prime, because it can be changed into another prime (212092151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106046060 + 106046061.

It is an arithmetic number, because the mean of its divisors is an integer number (106046061).

Almost surely, 2^212092121 is an apocalyptic number.

It is an amenable number.

212092121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212092121 is an equidigital number, since it uses as much as digits as its factorization.

212092121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 212092121 is about 14563.3828831079. The cubic root of 212092121 is about 596.3595500649.

The spelling of 212092121 in words is "two hundred twelve million, ninety-two thousand, one hundred twenty-one".