21929319211321 has 8 divisors (see below), whose sum is σ = 22043973853440. Its totient is φ = 21814945242768.

The previous prime is 21929319211307. The next prime is 21929319211343. The reversal of 21929319211321 is 12311291392912.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21929319211321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21929319214321) 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, 70011721 + ... + 70324246.

It is an arithmetic number, because the mean of its divisors is an integer number (2755496731680).

Almost surely, 2^{21929319211321} is an apocalyptic number.

It is an amenable number.

21929319211321 is a deficient number, since it is larger than the sum of its proper divisors (114654642119).

21929319211321 is a wasteful number, since it uses less digits than its factorization.

21929319211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140336783.

The product of its digits is 104976, while the sum is 46.

The spelling of 21929319211321 in words is "twenty-one trillion, nine hundred twenty-nine billion, three hundred nineteen million, two hundred eleven thousand, three hundred twenty-one".