10242000121 has 4 divisors (see below), whose sum is σ = 10491805044. Its totient is φ = 9992195200.

The previous prime is 10242000071. The next prime is 10242000127. The reversal of 10242000121 is 12100024201.

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 2 ways, for example, as 2085200896 + 8156799225 = 45664^2 + 90315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10242000121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10242000127) 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, 124902400 + ... + 124902481.

It is an arithmetic number, because the mean of its divisors is an integer number (2622951261).

Almost surely, 2^10242000121 is an apocalyptic number.

It is an amenable number.

10242000121 is a deficient number, since it is larger than the sum of its proper divisors (249804923).

10242000121 is an equidigital number, since it uses as much as digits as its factorization.

10242000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249804922.

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

Adding to 10242000121 its reverse (12100024201), we get a palindrome (22342024322).

The spelling of 10242000121 in words is "ten billion, two hundred forty-two million, one hundred twenty-one", and thus it is an aban number.