21011042140323 has 16 divisors (see below), whose sum is σ = 28407975622656. Its totient is φ = 13811800769280.

The previous prime is 21011042140261. The next prime is 21011042140351. The reversal of 21011042140323 is 32304124011012.

It is not a de Polignac number, because 21011042140323 - 2¹³ = 21011042132131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21011042140293 and 21011042140302.

It is not an unprimeable number, because it can be changed into a prime (21011042140523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133136811 + ... + 133294532.

It is an arithmetic number, because the mean of its divisors is an integer number (1775498476416).

Almost surely, 2^{21011042140323} is an apocalyptic number.

21011042140323 is a deficient number, since it is larger than the sum of its proper divisors (7396933482333).

21011042140323 is a wasteful number, since it uses less digits than its factorization.

21011042140323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266431714.

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

Adding to 21011042140323 its reverse (32304124011012), we get a palindrome (53315166151335).

The spelling of 21011042140323 in words is "twenty-one trillion, eleven billion, forty-two million, one hundred forty thousand, three hundred twenty-three".