402003130421 has 4 divisors (see below), whose sum is σ = 402322435200. Its totient is φ = 401683825644.

The previous prime is 402003130349. The next prime is 402003130429. The reversal of 402003130421 is 124031300204.

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 402003130421 - 2¹⁸ = 402002868277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 402003130393 and 402003130402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402003130429) 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 3 ways as a sum of consecutive naturals, for example, 159650501 + ... + 159653018.

It is an arithmetic number, because the mean of its divisors is an integer number (100580608800).

Almost surely, 2^402003130421 is an apocalyptic number.

It is an amenable number.

402003130421 is a deficient number, since it is larger than the sum of its proper divisors (319304779).

402003130421 is a wasteful number, since it uses less digits than its factorization.

402003130421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319304778.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 402003130421 its reverse (124031300204), we get a palindrome (526034430625).

The spelling of 402003130421 in words is "four hundred two billion, three million, one hundred thirty thousand, four hundred twenty-one".