21221011120103 has 2 divisors, whose sum is σ = 21221011120104. Its totient is φ = 21221011120102.

The previous prime is 21221011120097. The next prime is 21221011120117. The reversal of 21221011120103 is 30102111012212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221011120103 - 2³⁶ = 21152291643367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221011126103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610505560051 + 10610505560052.

It is an arithmetic number, because the mean of its divisors is an integer number (10610505560052).

Almost surely, 2^{21221011120103} is an apocalyptic number.

21221011120103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221011120103 is an equidigital number, since it uses as much as digits as its factorization.

21221011120103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21221011120103 its reverse (30102111012212), we get a palindrome (51323122132315).

The spelling of 21221011120103 in words is "twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred twenty thousand, one hundred three".