21310605011 has 8 divisors (see below), whose sum is σ = 21731618304. Its totient is φ = 20890292800.

The previous prime is 21310604999. The next prime is 21310605013. The reversal of 21310605011 is 11050601312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310605011 - 2²² = 21306410707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310605013) 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, 113666 + ... + 235671.

It is an arithmetic number, because the mean of its divisors is an integer number (2716452288).

Almost surely, 2^21310605011 is an apocalyptic number.

21310605011 is a deficient number, since it is larger than the sum of its proper divisors (421013293).

21310605011 is a wasteful number, since it uses less digits than its factorization.

21310605011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350541.

The product of its (nonzero) digits is 180, while the sum is 20.

The spelling of 21310605011 in words is "twenty-one billion, three hundred ten million, six hundred five thousand, eleven".