102100200000121 has 4 divisors (see below), whose sum is σ = 102100228700544. Its totient is φ = 102100171299700.

The previous prime is 102100200000109. The next prime is 102100200000137. The reversal of 102100200000121 is 121000002001201.

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 102100200000121 - 2¹⁷ = 102100199869049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100200000098 and 102100200000107.

It is not an unprimeable number, because it can be changed into a prime (102100200003121) 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, 8109325 + ... + 16430506.

It is an arithmetic number, because the mean of its divisors is an integer number (25525057175136).

Almost surely, 2^{102100200000121} is an apocalyptic number.

It is an amenable number.

102100200000121 is a deficient number, since it is larger than the sum of its proper divisors (28700423).

102100200000121 is an equidigital number, since it uses as much as digits as its factorization.

102100200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28700422.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102100200000121 its reverse (121000002001201), we get a palindrome (223100202001322).

The spelling of 102100200000121 in words is "one hundred two trillion, one hundred billion, two hundred million, one hundred twenty-one", and thus it is an aban number.