21322212123103 has 4 divisors (see below), whose sum is σ = 21385482782560. Its totient is φ = 21258941463648.

The previous prime is 21322212122971. The next prime is 21322212123181. The reversal of 21322212123103 is 30132121222312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21322212123103 - 2²⁹ = 21321675252191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322212163103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31635329223 + ... + 31635329896.

It is an arithmetic number, because the mean of its divisors is an integer number (5346370695640).

Almost surely, 2^{21322212123103} is an apocalyptic number.

21322212123103 is a deficient number, since it is larger than the sum of its proper divisors (63270659457).

21322212123103 is an equidigital number, since it uses as much as digits as its factorization.

21322212123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63270659456.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21322212123103 its reverse (30132121222312), we get a palindrome (51454333345415).

The spelling of 21322212123103 in words is "twenty-one trillion, three hundred twenty-two billion, two hundred twelve million, one hundred twenty-three thousand, one hundred three".