211421014311421 has 16 divisors (see below), whose sum is σ = 226396074902400. Its totient is φ = 196734254635008.

The previous prime is 211421014311401. The next prime is 211421014311469. The reversal of 211421014311421 is 124113410124112.

It is not a de Polignac number, because 211421014311421 - 2¹⁹ = 211421013787133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211421014311421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421014311401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96446836 + ... + 98614573.

It is an arithmetic number, because the mean of its divisors is an integer number (14149754681400).

Almost surely, 2^{211421014311421} is an apocalyptic number.

It is an amenable number.

211421014311421 is a deficient number, since it is larger than the sum of its proper divisors (14975060590979).

211421014311421 is a wasteful number, since it uses less digits than its factorization.

211421014311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195062148.

The product of its (nonzero) digits is 1536, while the sum is 28.

Adding to 211421014311421 its reverse (124113410124112), we get a palindrome (335534424435533).

The spelling of 211421014311421 in words is "two hundred eleven trillion, four hundred twenty-one billion, fourteen million, three hundred eleven thousand, four hundred twenty-one".