21223223251123 has 2 divisors, whose sum is σ = 21223223251124. Its totient is φ = 21223223251122.

The previous prime is 21223223251093. The next prime is 21223223251171. The reversal of 21223223251123 is 32115232232212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223223251123 is a prime.

It is a super-2 number, since 2×21223223251123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21223223251423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611611625561 + 10611611625562.

It is an arithmetic number, because the mean of its divisors is an integer number (10611611625562).

Almost surely, 2^{21223223251123} is an apocalyptic number.

21223223251123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223223251123 is an equidigital number, since it uses as much as digits as its factorization.

21223223251123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

Adding to 21223223251123 its reverse (32115232232212), we get a palindrome (53338455483335).

The spelling of 21223223251123 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty-three million, two hundred fifty-one thousand, one hundred twenty-three".