102251542321 has 4 divisors (see below), whose sum is σ = 102701989872. Its totient is φ = 101801094772.

The previous prime is 102251542301. The next prime is 102251542343. The reversal of 102251542321 is 123245152201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123245152201 = 31 ⋅3975650071.

It is a cyclic number.

It is not a de Polignac number, because 102251542321 - 2¹⁹ = 102251018033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102251542321.

It is not an unprimeable number, because it can be changed into a prime (102251542301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225223435 + ... + 225223888.

It is an arithmetic number, because the mean of its divisors is an integer number (25675497468).

Almost surely, 2^102251542321 is an apocalyptic number.

It is an amenable number.

102251542321 is a deficient number, since it is larger than the sum of its proper divisors (450447551).

102251542321 is an equidigital number, since it uses as much as digits as its factorization.

102251542321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450447550.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 102251542321 its reverse (123245152201), we get a palindrome (225496694522).

The spelling of 102251542321 in words is "one hundred two billion, two hundred fifty-one million, five hundred forty-two thousand, three hundred twenty-one".