211421401406 has 8 divisors (see below), whose sum is σ = 317469120984. Its totient is φ = 105598361080.

The previous prime is 211421401333. The next prime is 211421401423. The reversal of 211421401406 is 604104124112.

211421401406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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, 56167460 + ... + 56171223.

It is an arithmetic number, because the mean of its divisors is an integer number (39683640123).

Almost surely, 2^211421401406 is an apocalyptic number.

211421401406 is a deficient number, since it is larger than the sum of its proper divisors (106047719578).

211421401406 is a wasteful number, since it uses less digits than its factorization.

211421401406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112339626.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 211421401406 its reverse (604104124112), we get a palindrome (815525525518).

The spelling of 211421401406 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred one thousand, four hundred six".