21030243044311 has 64 divisors (see below), whose sum is σ = 22652384832000. Its totient is φ = 19467704954880.

The previous prime is 21030243044269. The next prime is 21030243044341. The reversal of 21030243044311 is 11344034203012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21030243044311 - 2³¹ = 21028095560663 is a prime.

It is a super-2 number, since 2×21030243044311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21030243044311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030243044341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22444229035 + ... + 22444229971.

It is an arithmetic number, because the mean of its divisors is an integer number (353943513000).

Almost surely, 2^{21030243044311} is an apocalyptic number.

21030243044311 is a deficient number, since it is larger than the sum of its proper divisors (1622141787689).

21030243044311 is a wasteful number, since it uses less digits than its factorization.

21030243044311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21030243044311 its reverse (11344034203012), we get a palindrome (32374277247323).

The spelling of 21030243044311 in words is "twenty-one trillion, thirty billion, two hundred forty-three million, forty-four thousand, three hundred eleven".