21000244312311 has 32 divisors (see below), whose sum is σ = 32383352150016. Its totient is φ = 11983970736000.

The previous prime is 21000244312301. The next prime is 21000244312339. The reversal of 21000244312311 is 11321344200012.

It is not a de Polignac number, because 21000244312311 - 2⁵ = 21000244312279 is a prime.

It is a super-2 number, since 2×21000244312311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000244312301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277368880 + ... + 277444581.

It is an arithmetic number, because the mean of its divisors is an integer number (1011979754688).

Almost surely, 2^{21000244312311} is an apocalyptic number.

21000244312311 is a deficient number, since it is larger than the sum of its proper divisors (11383107837705).

21000244312311 is a wasteful number, since it uses less digits than its factorization.

21000244312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554813543.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21000244312311 its reverse (11321344200012), we get a palindrome (32321588512323).

The spelling of 21000244312311 in words is "twenty-one trillion, two hundred forty-four million, three hundred twelve thousand, three hundred eleven".