10200000121 has 4 divisors (see below), whose sum is σ = 10220774544. Its totient is φ = 10179225700.

The previous prime is 10200000077. The next prime is 10200000143. The reversal of 10200000121 is 12100000201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10200000121 - 2⁷ = 10199999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10200000721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10386475 + ... + 10387456.

It is an arithmetic number, because the mean of its divisors is an integer number (2555193636).

Almost surely, 2^10200000121 is an apocalyptic number.

It is an amenable number.

10200000121 is a deficient number, since it is larger than the sum of its proper divisors (20774423).

10200000121 is an equidigital number, since it uses as much as digits as its factorization.

10200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20774422.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 10200000121 its reverse (12100000201), we get a palindrome (22300000322).

The spelling of 10200000121 in words is "ten billion, two hundred million, one hundred twenty-one", and thus it is an aban number.