2101123206 has 64 divisors (see below), whose sum is σ = 5746675200. Its totient is φ = 554141088.

The previous prime is 2101123133. The next prime is 2101123207. The reversal of 2101123206 is 6023211012.

2101123206 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101123207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208876 + ... + 218703.

It is an arithmetic number, because the mean of its divisors is an integer number (89791800).

Almost surely, 2^2101123206 is an apocalyptic number.

2101123206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2101123206 is an abundant number, since it is smaller than the sum of its proper divisors (3645551994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101123206 is a wasteful number, since it uses less digits than its factorization.

2101123206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427610 (or 427604 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2101123206 is about 45838.0104934758. The cubic root of 2101123206 is about 1280.8074344857.

Adding to 2101123206 its reverse (6023211012), we get a palindrome (8124334218).

The spelling of 2101123206 in words is "two billion, one hundred one million, one hundred twenty-three thousand, two hundred six".