211123335405 has 32 divisors (see below), whose sum is σ = 360447085440. Its totient is φ = 105211560960.

The previous prime is 211123335349. The next prime is 211123335433. The reversal of 211123335405 is 504533321112.

It is not a de Polignac number, because 211123335405 - 2⁶ = 211123335341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5053056 + ... + 5094665.

It is an arithmetic number, because the mean of its divisors is an integer number (11263971420).

Almost surely, 2^211123335405 is an apocalyptic number.

It is an amenable number.

211123335405 is a deficient number, since it is larger than the sum of its proper divisors (149323750035).

211123335405 is a wasteful number, since it uses less digits than its factorization.

211123335405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10147821.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 211123335405 its reverse (504533321112), we get a palindrome (715656656517).

The spelling of 211123335405 in words is "two hundred eleven billion, one hundred twenty-three million, three hundred thirty-five thousand, four hundred five".