2121100222123 has 2 divisors, whose sum is σ = 2121100222124. Its totient is φ = 2121100222122.

The previous prime is 2121100222051. The next prime is 2121100222169. The reversal of 2121100222123 is 3212220011212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121100222123 - 2¹⁷ = 2121100091051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121100222123.

It is not a weakly prime, because it can be changed into another prime (2121100222183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060550111061 + 1060550111062.

It is an arithmetic number, because the mean of its divisors is an integer number (1060550111062).

Almost surely, 2^{2121100222123} is an apocalyptic number.

2121100222123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121100222123 is an equidigital number, since it uses as much as digits as its factorization.

2121100222123 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 2121100222123 its reverse (3212220011212), we get a palindrome (5333320233335).

The spelling of 2121100222123 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-three".