102000020121 has 8 divisors (see below), whose sum is σ = 151111140960. Its totient is φ = 68000013396.

The previous prime is 102000020029. The next prime is 102000020131. The reversal of 102000020121 is 121020000201.

It is not a de Polignac number, because 102000020121 - 2¹¹ = 102000018073 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102000020131) 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 7 ways as a sum of consecutive naturals, for example, 1888889235 + ... + 1888889288.

It is an arithmetic number, because the mean of its divisors is an integer number (18888892620).

Almost surely, 2^102000020121 is an apocalyptic number.

It is an amenable number.

102000020121 is a deficient number, since it is larger than the sum of its proper divisors (49111120839).

102000020121 is an equidigital number, since it uses as much as digits as its factorization.

102000020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777778532 (or 3777778526 counting only the distinct ones).

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

Adding to 102000020121 its reverse (121020000201), we get a palindrome (223020020322).

The spelling of 102000020121 in words is "one hundred two billion, twenty thousand, one hundred twenty-one".