20001222211123 has 2 divisors, whose sum is σ = 20001222211124. Its totient is φ = 20001222211122.

The previous prime is 20001222211099. The next prime is 20001222211147. The reversal of 20001222211123 is 32111222210002.

It is a balanced prime because it is at equal distance from previous prime (20001222211099) and next prime (20001222211147).

It is a cyclic number.

It is not a de Polignac number, because 20001222211123 - 2⁹ = 20001222210611 is a prime.

It is a super-2 number, since 2×20001222211123² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001222211123.

It is not a weakly prime, because it can be changed into another prime (20001222211163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000611105561 + 10000611105562.

It is an arithmetic number, because the mean of its divisors is an integer number (10000611105562).

Almost surely, 2^{20001222211123} is an apocalyptic number.

20001222211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001222211123 is an equidigital number, since it uses as much as digits as its factorization.

20001222211123 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 20001222211123 its reverse (32111222210002), we get a palindrome (52112444421125).

The spelling of 20001222211123 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-three".