102442421221 has 8 divisors (see below), whose sum is σ = 117236781824. Its totient is φ = 87687992880.

The previous prime is 102442421197. The next prime is 102442421233. The reversal of 102442421221 is 122124244201.

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 102442421221 - 2⁵ = 102442421189 is a prime.

It is a super-2 number, since 2×102442421221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102442421261) 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, 9977565 + ... + 9987826.

It is an arithmetic number, because the mean of its divisors is an integer number (14654597728).

Almost surely, 2^102442421221 is an apocalyptic number.

It is an amenable number.

102442421221 is a deficient number, since it is larger than the sum of its proper divisors (14794360603).

102442421221 is an equidigital number, since it uses as much as digits as its factorization.

102442421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19966131.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 102442421221 its reverse (122124244201), we get a palindrome (224566665422).

The spelling of 102442421221 in words is "one hundred two billion, four hundred forty-two million, four hundred twenty-one thousand, two hundred twenty-one".