2101342123 has 8 divisors (see below), whose sum is σ = 2207229696. Its totient is φ = 1996665000.

The previous prime is 2101342121. The next prime is 2101342181. The reversal of 2101342123 is 3212431012.

It is a happy number.

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 2101342123 - 2¹ = 2101342121 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 2101342123.

It is not an unprimeable number, because it can be changed into a prime (2101342121) 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, 299053 + ... + 305998.

It is an arithmetic number, because the mean of its divisors is an integer number (275903712).

Almost surely, 2^2101342123 is an apocalyptic number.

2101342123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2101342123 is a deficient number, since it is larger than the sum of its proper divisors (105887573).

2101342123 is a wasteful number, since it uses less digits than its factorization.

2101342123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605225.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2101342123 is about 45840.3983730508. The cubic root of 2101342123 is about 1280.8519155808.

Adding to 2101342123 its reverse (3212431012), we get a palindrome (5313773135).

Subtracting 2101342123 from its reverse (3212431012), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 21013 and 42123, that added together give a palindrome (63136).

The spelling of 2101342123 in words is "two billion, one hundred one million, three hundred forty-two thousand, one hundred twenty-three".