102234402421 has 4 divisors (see below), whose sum is σ = 102920539500. Its totient is φ = 101548265344.

The previous prime is 102234402407. The next prime is 102234402503. The reversal of 102234402421 is 124204432201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124204432201 = 19 ⋅6537075379.

It can be written as a sum of positive squares in 2 ways, for example, as 27109622500 + 75124779921 = 164650^2 + 274089^2 .

It is a cyclic number.

It is not a de Polignac number, because 102234402421 - 2¹⁹ = 102233878133 is a prime.

It is a super-2 number, since 2×102234402421² (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 (102234402121) 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, 343068316 + ... + 343068613.

It is an arithmetic number, because the mean of its divisors is an integer number (25730134875).

Almost surely, 2^102234402421 is an apocalyptic number.

It is an amenable number.

102234402421 is a deficient number, since it is larger than the sum of its proper divisors (686137079).

102234402421 is an equidigital number, since it uses as much as digits as its factorization.

102234402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686137078.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 102234402421 its reverse (124204432201), we get a palindrome (226438834622).

The spelling of 102234402421 in words is "one hundred two billion, two hundred thirty-four million, four hundred two thousand, four hundred twenty-one".