102040132421 has 4 divisors (see below), whose sum is σ = 102574374144. Its totient is φ = 101505890700.

The previous prime is 102040132361. The next prime is 102040132423. The reversal of 102040132421 is 124231040201.

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.

It is a cyclic number.

It is not a de Polignac number, because 102040132421 - 2²⁶ = 101973023557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102040132393 and 102040132402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102040132423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267120575 + ... + 267120956.

It is an arithmetic number, because the mean of its divisors is an integer number (25643593536).

Almost surely, 2^102040132421 is an apocalyptic number.

It is an amenable number.

102040132421 is a deficient number, since it is larger than the sum of its proper divisors (534241723).

102040132421 is an equidigital number, since it uses as much as digits as its factorization.

102040132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534241722.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 102040132421 its reverse (124231040201), we get a palindrome (226271172622).

The spelling of 102040132421 in words is "one hundred two billion, forty million, one hundred thirty-two thousand, four hundred twenty-one".