211404013442 has 16 divisors (see below), whose sum is σ = 317408050872. Its totient is φ = 105601372800.

The previous prime is 211404013411. The next prime is 211404013489. The reversal of 211404013442 is 244310404112.

It can be written as a sum of positive squares in 4 ways, for example, as 209827208761 + 1576804681 = 458069^2 + 39709^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13718942 + ... + 13734342.

Almost surely, 2^211404013442 is an apocalyptic number.

211404013442 is a deficient number, since it is larger than the sum of its proper divisors (106004037430).

211404013442 is a wasteful number, since it uses less digits than its factorization.

211404013442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21493.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 211404013442 its reverse (244310404112), we get a palindrome (455714417554).

The spelling of 211404013442 in words is "two hundred eleven billion, four hundred four million, thirteen thousand, four hundred forty-two".