2100111123331 has 4 divisors (see below), whose sum is σ = 2261658132832. Its totient is φ = 1938564113832.

The previous prime is 2100111123281. The next prime is 2100111123349. The reversal of 2100111123331 is 1333211110012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100111123331 - 2²⁵ = 2100077568899 is a prime.

It is a super-2 number, since 2×2100111123331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100111123299 and 2100111123308.

It is not an unprimeable number, because it can be changed into a prime (2100111121331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80773504731 + ... + 80773504756.

It is an arithmetic number, because the mean of its divisors is an integer number (565414533208).

Almost surely, 2^{2100111123331} is an apocalyptic number.

2100111123331 is a deficient number, since it is larger than the sum of its proper divisors (161547009501).

2100111123331 is a wasteful number, since it uses less digits than its factorization.

2100111123331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161547009500.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 2100111123331 its reverse (1333211110012), we get a palindrome (3433322233343).

The spelling of 2100111123331 in words is "two trillion, one hundred billion, one hundred eleven million, one hundred twenty-three thousand, three hundred thirty-one".