211420231018 has 4 divisors (see below), whose sum is σ = 317130346530. Its totient is φ = 105710115508.

The previous prime is 211420231013. The next prime is 211420231019. The reversal of 211420231018 is 810132024112.

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

It can be written as a sum of positive squares in only one way, i.e., 159701739129 + 51718491889 = 399627^2 + 227417^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211420230983 and 211420231001.

It is not an unprimeable number, because it can be changed into a prime (211420231013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52855057753 + ... + 52855057756.

Almost surely, 2^211420231018 is an apocalyptic number.

211420231018 is a deficient number, since it is larger than the sum of its proper divisors (105710115512).

211420231018 is a wasteful number, since it uses less digits than its factorization.

211420231018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105710115511.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 211420231018 in words is "two hundred eleven billion, four hundred twenty million, two hundred thirty-one thousand, eighteen".