211440334031021 has 4 divisors (see below), whose sum is σ = 211440365976672. Its totient is φ = 211440302085372.

The previous prime is 211440334030993. The next prime is 211440334031063. The reversal of 211440334031021 is 120130433044112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211440334031021 - 2²² = 211440329836717 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 (211440334031621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928441 + ... + 20654286.

It is an arithmetic number, because the mean of its divisors is an integer number (52860091494168).

Almost surely, 2^{211440334031021} is an apocalyptic number.

It is an amenable number.

211440334031021 is a deficient number, since it is larger than the sum of its proper divisors (31945651).

211440334031021 is an equidigital number, since it uses as much as digits as its factorization.

211440334031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31945650.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 211440334031021 its reverse (120130433044112), we get a palindrome (331570767075133).

The spelling of 211440334031021 in words is "two hundred eleven trillion, four hundred forty billion, three hundred thirty-four million, thirty-one thousand, twenty-one".