20212103 has 2 divisors, whose sum is σ = 20212104. Its totient is φ = 20212102.

The previous prime is 20212097. The next prime is 20212111. The reversal of 20212103 is 30121202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212103 - 2⁸ = 20211847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106051 + 10106052.

It is an arithmetic number, because the mean of its divisors is an integer number (10106052).

Almost surely, 2^20212103 is an apocalyptic number.

20212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212103 is an equidigital number, since it uses as much as digits as its factorization.

20212103 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 11.

The square root of 20212103 is about 4495.7872503044. The cubic root of 20212103 is about 272.3979496109.

Adding to 20212103 its reverse (30121202), we get a palindrome (50333305).

Subtracting 20212103 from its reverse (30121202), we obtain a palindrome (9909099).

The spelling of 20212103 in words is "twenty million, two hundred twelve thousand, one hundred three".