2123101123 has 16 divisors (see below), whose sum is σ = 2574738432. Its totient is φ = 1724148000.

The previous prime is 2123101069. The next prime is 2123101139. The reversal of 2123101123 is 3211013212.

It is a cyclic number.

It is not a de Polignac number, because 2123101123 - 2⁹ = 2123100611 is a prime.

It is a super-2 number, since 2×2123101123² = 9015116756967722258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101097 and 2123101106.

It is not an unprimeable number, because it can be changed into a prime (2123105123) 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, 235033 + ... + 243898.

It is an arithmetic number, because the mean of its divisors is an integer number (160921152).

Almost surely, 2^2123101123 is an apocalyptic number.

2123101123 is a deficient number, since it is larger than the sum of its proper divisors (451637309).

2123101123 is a wasteful number, since it uses less digits than its factorization.

2123101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478986.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2123101123 is about 46077.1214704217. The cubic root of 2123101123 is about 1285.2577363075.

Adding to 2123101123 its reverse (3211013212), we get a palindrome (5334114335).

The spelling of 2123101123 in words is "two billion, one hundred twenty-three million, one hundred one thousand, one hundred twenty-three".