211121213242 has 8 divisors (see below), whose sum is σ = 319817283732. Its totient is φ = 104515452000.

The previous prime is 211121213213. The next prime is 211121213279. The reversal of 211121213242 is 242312121112.

It can be written as a sum of positive squares in 2 ways, for example, as 195373724121 + 15747489121 = 442011^2 + 125489^2 .

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

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, 522577059 + ... + 522577462.

Almost surely, 2^211121213242 is an apocalyptic number.

211121213242 is a deficient number, since it is larger than the sum of its proper divisors (108696070490).

211121213242 is a wasteful number, since it uses less digits than its factorization.

211121213242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045154624.

The product of its digits is 384, while the sum is 22.

Adding to 211121213242 its reverse (242312121112), we get a palindrome (453433334354).

The spelling of 211121213242 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred forty-two".