2001100222123 has 2 divisors, whose sum is σ = 2001100222124. Its totient is φ = 2001100222122.

The previous prime is 2001100222097. The next prime is 2001100222129. The reversal of 2001100222123 is 3212220011002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001100222123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001100222097 and 2001100222106.

It is not a weakly prime, because it can be changed into another prime (2001100222129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000550111061 + 1000550111062.

It is an arithmetic number, because the mean of its divisors is an integer number (1000550111062).

Almost surely, 2^{2001100222123} is an apocalyptic number.

2001100222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001100222123 is an equidigital number, since it uses as much as digits as its factorization.

2001100222123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2001100222123 its reverse (3212220011002), we get a palindrome (5213320233125).

The spelling of 2001100222123 in words is "two trillion, one billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-three".