102200121 has 12 divisors (see below), whose sum is σ = 151056048. Its totient is φ = 66548664.

The previous prime is 102200117. The next prime is 102200129. The reversal of 102200121 is 121002201.

It is not a de Polignac number, because 102200121 - 2² = 102200117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (102200129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131655 + ... + 132428.

It is an arithmetic number, because the mean of its divisors is an integer number (12588004).

Almost surely, 2^102200121 is an apocalyptic number.

It is an amenable number.

102200121 is a deficient number, since it is larger than the sum of its proper divisors (48855927).

102200121 is a wasteful number, since it uses less digits than its factorization.

102200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264132 (or 264129 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 102200121 is about 10109.4075494066. The cubic root of 102200121 is about 467.5382389342.

Adding to 102200121 its reverse (121002201), we get a palindrome (223202322).

The spelling of 102200121 in words is "one hundred two million, two hundred thousand, one hundred twenty-one".