102200020121 has 4 divisors (see below), whose sum is σ = 102269029044. Its totient is φ = 102131011200.

The previous prime is 102200020081. The next prime is 102200020157. The reversal of 102200020121 is 121020002201.

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 63471748096 + 38728272025 = 251936^2 + 196795^2 .

It is a cyclic number.

It is not a de Polignac number, because 102200020121 - 2³⁴ = 85020150937 is a prime.

It is a super-2 number, since 2×102200020121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102200022121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34502240 + ... + 34505201.

It is an arithmetic number, because the mean of its divisors is an integer number (25567257261).

Almost surely, 2^102200020121 is an apocalyptic number.

It is an amenable number.

102200020121 is a deficient number, since it is larger than the sum of its proper divisors (69008923).

102200020121 is an equidigital number, since it uses as much as digits as its factorization.

102200020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69008922.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102200020121 its reverse (121020002201), we get a palindrome (223220022322).

The spelling of 102200020121 in words is "one hundred two billion, two hundred million, twenty thousand, one hundred twenty-one".