102123231221 has 8 divisors (see below), whose sum is σ = 111470952864. Its totient is φ = 92786141520.

The previous prime is 102123231193. The next prime is 102123231239. The reversal of 102123231221 is 122132321201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102123231221 - 2³⁴ = 84943362037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102123231193 and 102123231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102123231241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2637890 + ... + 2676323.

It is an arithmetic number, because the mean of its divisors is an integer number (13933869108).

Almost surely, 2^102123231221 is an apocalyptic number.

102123231221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102123231221 is a deficient number, since it is larger than the sum of its proper divisors (9347721643).

102123231221 is a wasteful number, since it uses less digits than its factorization.

102123231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315971.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 102123231221 its reverse (122132321201), we get a palindrome (224255552422).

The spelling of 102123231221 in words is "one hundred two billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred twenty-one".