10200121 has 4 divisors (see below), whose sum is σ = 10226212. Its totient is φ = 10174032.

The previous prime is 10200107. The next prime is 10200139. The reversal of 10200121 is 12100201.

10200121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8065600 + 2134521 = 2840^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 10200121 - 2⁵ = 10200089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10200101) 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, 12450 + ... + 13243.

It is an arithmetic number, because the mean of its divisors is an integer number (2556553).

Almost surely, 2^10200121 is an apocalyptic number.

It is an amenable number.

10200121 is a deficient number, since it is larger than the sum of its proper divisors (26091).

10200121 is an equidigital number, since it uses as much as digits as its factorization.

10200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26090.

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

The square root of 10200121 is about 3193.7628277629. The cubic root of 10200121 is about 216.8711460806.

Adding to 10200121 its reverse (12100201), we get a palindrome (22300322).

The spelling of 10200121 in words is "ten million, two hundred thousand, one hundred twenty-one".