21041020344311 has 4 divisors (see below), whose sum is σ = 22953840375624. Its totient is φ = 19128200313000.

The previous prime is 21041020344301. The next prime is 21041020344349. The reversal of 21041020344311 is 11344302014012.

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

It is a cyclic number.

It is not a de Polignac number, because 21041020344311 - 2⁴² = 16642973833207 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 (21041020344301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956410015640 + ... + 956410015661.

It is an arithmetic number, because the mean of its divisors is an integer number (5738460093906).

Almost surely, 2^{21041020344311} is an apocalyptic number.

21041020344311 is a deficient number, since it is larger than the sum of its proper divisors (1912820031313).

21041020344311 is a wasteful number, since it uses less digits than its factorization.

21041020344311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912820031312.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21041020344311 its reverse (11344302014012), we get a palindrome (32385322358323).

The spelling of 21041020344311 in words is "twenty-one trillion, forty-one billion, twenty million, three hundred forty-four thousand, three hundred eleven".