2111320124021 has 8 divisors (see below), whose sum is σ = 2290040192664. Its totient is φ = 1938658362880.

The previous prime is 2111320124009. The next prime is 2111320124041. The reversal of 2111320124021 is 1204210231112.

It can be written as a sum of positive squares in 4 ways, for example, as 125365564900 + 1985954559121 = 354070^2 + 1409239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111320124021 - 2¹⁰ = 2111320122997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111320123984 and 2111320124002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111320124041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514576150 + ... + 1514577543.

It is an arithmetic number, because the mean of its divisors is an integer number (286255024083).

Almost surely, 2^{2111320124021} is an apocalyptic number.

It is an amenable number.

2111320124021 is a deficient number, since it is larger than the sum of its proper divisors (178720068643).

2111320124021 is a wasteful number, since it uses less digits than its factorization.

2111320124021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029153751.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2111320124021 its reverse (1204210231112), we get a palindrome (3315530355133).

The spelling of 2111320124021 in words is "two trillion, one hundred eleven billion, three hundred twenty million, one hundred twenty-four thousand, twenty-one".