21323121130311 has 128 divisors (see below), whose sum is σ = 39919014051840. Its totient is φ = 9759083558400.

The previous prime is 21323121130309. The next prime is 21323121130351. The reversal of 21323121130311 is 11303112132312.

It is not a de Polignac number, because 21323121130311 - 2¹ = 21323121130309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323121130301) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 31505970 + ... + 32175648.

It is an arithmetic number, because the mean of its divisors is an integer number (311867297280).

Almost surely, 2^{21323121130311} is an apocalyptic number.

21323121130311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21323121130311 is a deficient number, since it is larger than the sum of its proper divisors (18595892921529).

21323121130311 is a wasteful number, since it uses less digits than its factorization.

21323121130311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670197.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21323121130311 its reverse (11303112132312), we get a palindrome (32626233262623).

It can be divided in two parts, 2132312 and 1130311, that added together give a palindrome (3262623).

The spelling of 21323121130311 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred twenty-one million, one hundred thirty thousand, three hundred eleven".