21121120111103 has 2 divisors, whose sum is σ = 21121120111104. Its totient is φ = 21121120111102.

The previous prime is 21121120111097. The next prime is 21121120111109. The reversal of 21121120111103 is 30111102112112.

It is a balanced prime because it is at equal distance from previous prime (21121120111097) and next prime (21121120111109).

It is a cyclic number.

It is not a de Polignac number, because 21121120111103 - 2³⁴ = 21103940241919 is a prime.

It is a super-2 number, since 2×21121120111103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121120111109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560560055551 + 10560560055552.

It is an arithmetic number, because the mean of its divisors is an integer number (10560560055552).

Almost surely, 2^{21121120111103} is an apocalyptic number.

21121120111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121120111103 is an equidigital number, since it uses as much as digits as its factorization.

21121120111103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 21121120111103 its reverse (30111102112112), we get a palindrome (51232222223215).

The spelling of 21121120111103 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred three".