2101434123 has 16 divisors (see below), whose sum is σ = 2991732480. Its totient is φ = 1308879264.

The previous prime is 2101434017. The next prime is 2101434133. The reversal of 2101434123 is 3214341012.

It is not a de Polignac number, because 2101434123 - 2¹⁰ = 2101433099 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2101434123.

It is not an unprimeable number, because it can be changed into a prime (2101434133) 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, 351168 + ... + 357101.

It is an arithmetic number, because the mean of its divisors is an integer number (186983280).

Almost surely, 2^2101434123 is an apocalyptic number.

2101434123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2101434123 is a deficient number, since it is larger than the sum of its proper divisors (890298357).

2101434123 is a wasteful number, since it uses less digits than its factorization.

2101434123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708338.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2101434123 is about 45841.4018437482. The cubic root of 2101434123 is about 1280.8706078656.

Adding to 2101434123 its reverse (3214341012), we get a palindrome (5315775135).

The spelling of 2101434123 in words is "two billion, one hundred one million, four hundred thirty-four thousand, one hundred twenty-three".