2123021120111 has 4 divisors (see below), whose sum is σ = 2124911611992. Its totient is φ = 2121130628232.

The previous prime is 2123021120071. The next prime is 2123021120119. The reversal of 2123021120111 is 1110211203212.

It is a happy number.

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 2123021120111 - 2¹⁴ = 2123021103727 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 2123021120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123021120119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945244256 + ... + 945246501.

It is an arithmetic number, because the mean of its divisors is an integer number (531227902998).

Almost surely, 2^{2123021120111} is an apocalyptic number.

2123021120111 is a deficient number, since it is larger than the sum of its proper divisors (1890491881).

2123021120111 is a wasteful number, since it uses less digits than its factorization.

2123021120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890491880.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2123021120111 its reverse (1110211203212), we get a palindrome (3233232323323).

The spelling of 2123021120111 in words is "two trillion, one hundred twenty-three billion, twenty-one million, one hundred twenty thousand, one hundred eleven".