102321212121 has 24 divisors (see below), whose sum is σ = 153291762624. Its totient is φ = 68205026160.

The previous prime is 102321212101. The next prime is 102321212137. The reversal of 102321212121 is 121212123201.

102321212121 is a `hidden beast` number, since 10 + 2 + 321 + 212 + 121 = 666.

It is not a de Polignac number, because 102321212121 - 2³⁰ = 101247470297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102321212094 and 102321212103.

It is not an unprimeable number, because it can be changed into a prime (102321212101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2135851 + ... + 2183231.

It is an arithmetic number, because the mean of its divisors is an integer number (6387156776).

Almost surely, 2^102321212121 is an apocalyptic number.

It is an amenable number.

102321212121 is a deficient number, since it is larger than the sum of its proper divisors (50970550503).

102321212121 is an frugal number, since it uses more digits than its factorization.

102321212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56283 (or 56271 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 102321212121 its reverse (121212123201), we get a palindrome (223533335322).

The spelling of 102321212121 in words is "one hundred two billion, three hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".