21112110001223 has 2 divisors, whose sum is σ = 21112110001224. Its totient is φ = 21112110001222.

The previous prime is 21112110001153. The next prime is 21112110001231. The reversal of 21112110001223 is 32210001121112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112110001223 - 2¹⁸ = 21112109739079 is a prime.

It is a super-2 number, since 2×21112110001223² (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 (21112110001123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556055000611 + 10556055000612.

It is an arithmetic number, because the mean of its divisors is an integer number (10556055000612).

Almost surely, 2^{21112110001223} is an apocalyptic number.

21112110001223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112110001223 is an equidigital number, since it uses as much as digits as its factorization.

21112110001223 is an evil number, because the sum of its binary digits is even.

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

Adding to 21112110001223 its reverse (32210001121112), we get a palindrome (53322111122335).

The spelling of 21112110001223 in words is "twenty-one trillion, one hundred twelve billion, one hundred ten million, one thousand, two hundred twenty-three".