402104420433221 has 4 divisors (see below), whose sum is σ = 438659367745344. Its totient is φ = 365549473121100.

The previous prime is 402104420433211. The next prime is 402104420433241. The reversal of 402104420433221 is 122334024401204.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-402104420433221 is a prime.

It is a super-2 number, since 2×402104420433221² (a number of 30 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 (402104420433211) 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, 18277473656045 + ... + 18277473656066.

It is an arithmetic number, because the mean of its divisors is an integer number (109664841936336).

Almost surely, 2^{402104420433221} is an apocalyptic number.

It is an amenable number.

402104420433221 is a deficient number, since it is larger than the sum of its proper divisors (36554947312123).

402104420433221 is a wasteful number, since it uses less digits than its factorization.

402104420433221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36554947312122.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 402104420433221 its reverse (122334024401204), we get a palindrome (524438444834425).

The spelling of 402104420433221 in words is "four hundred two trillion, one hundred four billion, four hundred twenty million, four hundred thirty-three thousand, two hundred twenty-one".