2011002123 has 24 divisors (see below), whose sum is σ = 3047591568. Its totient is φ = 1172397888.

The previous prime is 2011002109. The next prime is 2011002239. The reversal of 2011002123 is 3212001102.

It is not a de Polignac number, because 2011002123 - 2⁴ = 2011002107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011002099 and 2011002108.

It is not an unprimeable number, because it can be changed into a prime (2011082123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57340 + ... + 85497.

It is an arithmetic number, because the mean of its divisors is an integer number (126982982).

Almost surely, 2^2011002123 is an apocalyptic number.

2011002123 is a deficient number, since it is larger than the sum of its proper divisors (1036589445).

2011002123 is a wasteful number, since it uses less digits than its factorization.

2011002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142891 (or 142872 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2011002123 is about 44844.1983204071. The cubic root of 2011002123 is about 1262.2271274853.

Adding to 2011002123 its reverse (3212001102), we get a palindrome (5223003225).

The spelling of 2011002123 in words is "two billion, eleven million, two thousand, one hundred twenty-three".