21011101323 has 8 divisors (see below), whose sum is σ = 28610861568. Its totient is φ = 13709370984.

The previous prime is 21011101283. The next prime is 21011101333. The reversal of 21011101323 is 32310111012.

It is a happy number.

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

It is not a de Polignac number, because 21011101323 - 2⁶ = 21011101259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011101333) 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, 74507311 + ... + 74507592.

It is an arithmetic number, because the mean of its divisors is an integer number (3576357696).

Almost surely, 2^21011101323 is an apocalyptic number.

21011101323 is a deficient number, since it is larger than the sum of its proper divisors (7599760245).

21011101323 is a wasteful number, since it uses less digits than its factorization.

21011101323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149014953.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21011101323 its reverse (32310111012), we get a palindrome (53321212335).

The spelling of 21011101323 in words is "twenty-one billion, eleven million, one hundred one thousand, three hundred twenty-three".