102120020012123 has 4 divisors (see below), whose sum is σ = 102120080067720. Its totient is φ = 102119959956528.

The previous prime is 102120020012117. The next prime is 102120020012141. The reversal of 102120020012123 is 321210020021201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102120020012123 - 2²² = 102120015817819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102120020012113) 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, 27400538 + ... + 30903551.

It is an arithmetic number, because the mean of its divisors is an integer number (25530020016930).

Almost surely, 2^{102120020012123} is an apocalyptic number.

102120020012123 is a deficient number, since it is larger than the sum of its proper divisors (60055597).

102120020012123 is an equidigital number, since it uses as much as digits as its factorization.

102120020012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60055596.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 102120020012123 its reverse (321210020021201), we get a palindrome (423330040033324).

The spelling of 102120020012123 in words is "one hundred two trillion, one hundred twenty billion, twenty million, twelve thousand, one hundred twenty-three".