102121424321 has 16 divisors (see below), whose sum is σ = 123602248704. Its totient is φ = 82477218384.

The previous prime is 102121424299. The next prime is 102121424351. The reversal of 102121424321 is 123424121201.

It is a cyclic number.

It is not a de Polignac number, because 102121424321 - 2¹⁰ = 102121423297 is a prime.

It is a super-2 number, since 2×102121424321² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121424351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4722755 + ... + 4744328.

It is an arithmetic number, because the mean of its divisors is an integer number (7725140544).

Almost surely, 2^102121424321 is an apocalyptic number.

It is an amenable number.

102121424321 is a deficient number, since it is larger than the sum of its proper divisors (21480824383).

102121424321 is an equidigital number, since it uses as much as digits as its factorization.

102121424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9467180.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 102121424321 its reverse (123424121201), we get a palindrome (225545545522).

The spelling of 102121424321 in words is "one hundred two billion, one hundred twenty-one million, four hundred twenty-four thousand, three hundred twenty-one".