21142122203 has 2 divisors, whose sum is σ = 21142122204. Its totient is φ = 21142122202.

The previous prime is 21142122193. The next prime is 21142122257. The reversal of 21142122203 is 30222124112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142122203 - 2⁶ = 21142122139 is a prime.

It is not a weakly prime, because it can be changed into another prime (21142122803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571061101 + 10571061102.

It is an arithmetic number, because the mean of its divisors is an integer number (10571061102).

Almost surely, 2^21142122203 is an apocalyptic number.

21142122203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142122203 is an equidigital number, since it uses as much as digits as its factorization.

21142122203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21142122203 its reverse (30222124112), we get a palindrome (51364246315).

The spelling of 21142122203 in words is "twenty-one billion, one hundred forty-two million, one hundred twenty-two thousand, two hundred three".