404012210104021 has 4 divisors (see below), whose sum is σ = 405702637761600. Its totient is φ = 402321782446444.

The previous prime is 404012210104003. The next prime is 404012210104049. The reversal of 404012210104021 is 120401012210404.

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 404012210104021 - 2¹⁷ = 404012209972949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404012210103983 and 404012210104001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404012210104001) 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, 845213828431 + ... + 845213828908.

It is an arithmetic number, because the mean of its divisors is an integer number (101425659440400).

Almost surely, 2^{404012210104021} is an apocalyptic number.

It is an amenable number.

404012210104021 is a deficient number, since it is larger than the sum of its proper divisors (1690427657579).

404012210104021 is a wasteful number, since it uses less digits than its factorization.

404012210104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690427657578.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 404012210104021 its reverse (120401012210404), we get a palindrome (524413222314425).

The spelling of 404012210104021 in words is "four hundred four trillion, twelve billion, two hundred ten million, one hundred four thousand, twenty-one".