21122144311 has 8 divisors (see below), whose sum is σ = 21228364080. Its totient is φ = 21016168128.

The previous prime is 21122144299. The next prime is 21122144327. The reversal of 21122144311 is 11344122112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122144311 is a prime.

It is a super-2 number, since 2×21122144311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122144611) 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, 114225 + ... + 235141.

It is an arithmetic number, because the mean of its divisors is an integer number (2653545510).

Almost surely, 2^21122144311 is an apocalyptic number.

21122144311 is a deficient number, since it is larger than the sum of its proper divisors (106219769).

21122144311 is a wasteful number, since it uses less digits than its factorization.

21122144311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121793.

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

Adding to 21122144311 its reverse (11344122112), we get a palindrome (32466266423).

The spelling of 21122144311 in words is "twenty-one billion, one hundred twenty-two million, one hundred forty-four thousand, three hundred eleven".