2102123442 has 8 divisors (see below), whose sum is σ = 4204246896. Its totient is φ = 700707812.

The previous prime is 2102123399. The next prime is 2102123447. The reversal of 2102123442 is 2443212012.

It is a sphenic number, since it is the product of 3 distinct primes.

2102123442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2102123447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175176948 + ... + 175176959.

It is an arithmetic number, because the mean of its divisors is an integer number (525530862).

Almost surely, 2^2102123442 is an apocalyptic number.

2102123442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2102123442 is a wasteful number, since it uses less digits than its factorization.

2102123442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350353912.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2102123442 is about 45848.9197473616. The cubic root of 2102123442 is about 1281.0106442840.

Adding to 2102123442 its reverse (2443212012), we get a palindrome (4545335454).

The spelling of 2102123442 in words is "two billion, one hundred two million, one hundred twenty-three thousand, four hundred forty-two".