211130031421 has 8 divisors (see below), whose sum is σ = 223568136504. Its totient is φ = 198694003200.

The previous prime is 211130031391. The next prime is 211130031449. The reversal of 211130031421 is 124130031112.

It can be written as a sum of positive squares in 4 ways, for example, as 196549468921 + 14580562500 = 443339^2 + 120750^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211130031421 - 2¹⁷ = 211129900349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211130031481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307440 + ... + 718873.

It is an arithmetic number, because the mean of its divisors is an integer number (27946017063).

Almost surely, 2^211130031421 is an apocalyptic number.

It is an amenable number.

211130031421 is a deficient number, since it is larger than the sum of its proper divisors (12438105083).

211130031421 is a wasteful number, since it uses less digits than its factorization.

211130031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038431.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211130031421 its reverse (124130031112), we get a palindrome (335260062533).

The spelling of 211130031421 in words is "two hundred eleven billion, one hundred thirty million, thirty-one thousand, four hundred twenty-one".