211211213314405 has 4 divisors (see below), whose sum is σ = 253453455977292. Its totient is φ = 168968970651520.

The previous prime is 211211213314393. The next prime is 211211213314427. The reversal of 211211213314405 is 504413312112112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35955157972644 + 175256055341761 = 5996262^2 + 13238431^2 .

It is not a de Polignac number, because 211211213314405 - 2²⁹ = 211210676443493 is a prime.

It is a super-2 number, since 2×211211213314405² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21121121331436 + ... + 21121121331445.

It is an arithmetic number, because the mean of its divisors is an integer number (63363363994323).

Almost surely, 2^{211211213314405} is an apocalyptic number.

It is an amenable number.

211211213314405 is a deficient number, since it is larger than the sum of its proper divisors (42242242662887).

211211213314405 is an equidigital number, since it uses as much as digits as its factorization.

211211213314405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42242242662886.

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 211211213314405 its reverse (504413312112112), we get a palindrome (715624525426517).

The spelling of 211211213314405 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred thirteen million, three hundred fourteen thousand, four hundred five".