21012323111203 has 2 divisors, whose sum is σ = 21012323111204. Its totient is φ = 21012323111202.

The previous prime is 21012323111191. The next prime is 21012323111327. The reversal of 21012323111203 is 30211132321012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012323111203 - 2³³ = 21003733176611 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312323111203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506161555601 + 10506161555602.

It is an arithmetic number, because the mean of its divisors is an integer number (10506161555602).

Almost surely, 2^{21012323111203} is an apocalyptic number.

21012323111203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012323111203 is an equidigital number, since it uses as much as digits as its factorization.

21012323111203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21012323111203 its reverse (30211132321012), we get a palindrome (51223455432215).

The spelling of 21012323111203 in words is "twenty-one trillion, twelve billion, three hundred twenty-three million, one hundred eleven thousand, two hundred three".