102123312121 has 16 divisors (see below), whose sum is σ = 108279705600. Its totient is φ = 96163295760.

The previous prime is 102123312107. The next prime is 102123312143. The reversal of 102123312121 is 121213321201.

It is a cyclic number.

It is not a de Polignac number, because 102123312121 - 2¹¹ = 102123310073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102123342121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204930 + ... + 496228.

It is an arithmetic number, because the mean of its divisors is an integer number (6767481600).

Almost surely, 2^102123312121 is an apocalyptic number.

It is an amenable number.

102123312121 is a deficient number, since it is larger than the sum of its proper divisors (6156393479).

102123312121 is a wasteful number, since it uses less digits than its factorization.

102123312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291636.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 102123312121 its reverse (121213321201), we get a palindrome (223336633322).

The spelling of 102123312121 in words is "one hundred two billion, one hundred twenty-three million, three hundred twelve thousand, one hundred twenty-one".