102121000018 has 16 divisors (see below), whose sum is σ = 156929109120. Its totient is φ = 49811479200.

The previous prime is 102120999989. The next prime is 102121000019. The reversal of 102121000018 is 810000121201.

It is a junction number, because it is equal to n+sod(n) for n = 102120999965 and 102121000010.

It is not an unprimeable number, because it can be changed into a prime (102121000019) 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 7 ways as a sum of consecutive naturals, for example, 1337083 + ... + 1411393.

It is an arithmetic number, because the mean of its divisors is an integer number (9808069320).

Almost surely, 2^102121000018 is an apocalyptic number.

102121000018 is a deficient number, since it is larger than the sum of its proper divisors (54808109102).

102121000018 is a wasteful number, since it uses less digits than its factorization.

102121000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91113.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102121000018 its reverse (810000121201), we get a palindrome (912121121219).

The spelling of 102121000018 in words is "one hundred two billion, one hundred twenty-one million, eighteen", and thus it is an aban number.