21312021302011 has 8 divisors (see below), whose sum is σ = 24617094124464. Its totient is φ = 18234884536320.

The previous prime is 21312021301979. The next prime is 21312021302027. The reversal of 21312021302011 is 11020312021312.

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 21312021302011 - 2⁵ = 21312021301979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21312021302011.

It is not an unprimeable number, because it can be changed into a prime (21312021302311) 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, 56984013990 + ... + 56984014363.

It is an arithmetic number, because the mean of its divisors is an integer number (3077136765558).

Almost surely, 2^{21312021302011} is an apocalyptic number.

21312021302011 is a deficient number, since it is larger than the sum of its proper divisors (3305072822453).

21312021302011 is a wasteful number, since it uses less digits than its factorization.

21312021302011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113968028381.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21312021302011 its reverse (11020312021312), we get a palindrome (32332333323323).

The spelling of 21312021302011 in words is "twenty-one trillion, three hundred twelve billion, twenty-one million, three hundred two thousand, eleven".