21011222220103 has 2 divisors, whose sum is σ = 21011222220104. Its totient is φ = 21011222220102.

The previous prime is 21011222220077. The next prime is 21011222220181. The reversal of 21011222220103 is 30102222211012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011222220103 - 2²⁵ = 21011188665671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011222220193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505611110051 + 10505611110052.

It is an arithmetic number, because the mean of its divisors is an integer number (10505611110052).

Almost surely, 2^{21011222220103} is an apocalyptic number.

21011222220103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011222220103 is an equidigital number, since it uses as much as digits as its factorization.

21011222220103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21011222220103 its reverse (30102222211012), we get a palindrome (51113444431115).

Subtracting 21011222220103 from its reverse (30102222211012), we obtain a palindrome (9090999990909).

The spelling of 21011222220103 in words is "twenty-one trillion, eleven billion, two hundred twenty-two million, two hundred twenty thousand, one hundred three".