2100101242 has 4 divisors (see below), whose sum is σ = 3150151866. Its totient is φ = 1050050620.

The previous prime is 2100101191. The next prime is 2100101243. The reversal of 2100101242 is 2421010012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1744816441 + 355284801 = 41771^2 + 18849^2 .

It is not an unprimeable number, because it can be changed into a prime (2100101243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525025309 + ... + 525025312.

Almost surely, 2^2100101242 is an apocalyptic number.

2100101242 is a deficient number, since it is larger than the sum of its proper divisors (1050050624).

2100101242 is a wasteful number, since it uses less digits than its factorization.

2100101242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050050623.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2100101242 is about 45826.8615770271. The cubic root of 2100101242 is about 1280.5997437672.

Adding to 2100101242 its reverse (2421010012), we get a palindrome (4521111254).

The spelling of 2100101242 in words is "two billion, one hundred million, one hundred one thousand, two hundred forty-two".