2100121311223 has 16 divisors (see below), whose sum is σ = 2404728224640. Its totient is φ = 1816905678336.

The previous prime is 2100121311217. The next prime is 2100121311247. The reversal of 2100121311223 is 3221131210012.

It is not a de Polignac number, because 2100121311223 - 2¹³ = 2100121303031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100121311223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100121311263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19827540 + ... + 19933177.

It is an arithmetic number, because the mean of its divisors is an integer number (150295514040).

Almost surely, 2^{2100121311223} is an apocalyptic number.

2100121311223 is a deficient number, since it is larger than the sum of its proper divisors (304606913417).

2100121311223 is a wasteful number, since it uses less digits than its factorization.

2100121311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39760986.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2100121311223 its reverse (3221131210012), we get a palindrome (5321252521235).

The spelling of 2100121311223 in words is "two trillion, one hundred billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty-three".