211404000421 has 8 divisors (see below), whose sum is σ = 217659077784. Its totient is φ = 205177420800.

The previous prime is 211404000389. The next prime is 211404000439. The reversal of 211404000421 is 124000404112.

It can be written as a sum of positive squares in 4 ways, for example, as 198158522500 + 13245477921 = 445150^2 + 115089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211404000421 - 2⁵ = 211404000389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211404000461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7109380 + ... + 7139053.

It is an arithmetic number, because the mean of its divisors is an integer number (27207384723).

Almost surely, 2^211404000421 is an apocalyptic number.

It is an amenable number.

211404000421 is a deficient number, since it is larger than the sum of its proper divisors (6255077363).

211404000421 is a wasteful number, since it uses less digits than its factorization.

211404000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14248871.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211404000421 its reverse (124000404112), we get a palindrome (335404404533).

The spelling of 211404000421 in words is "two hundred eleven billion, four hundred four million, four hundred twenty-one", and thus it is an aban number.