21011302131011 has 8 divisors (see below), whose sum is σ = 22277365641360. Its totient is φ = 19748583571968.

The previous prime is 21011302130971. The next prime is 21011302131013. The reversal of 21011302131011 is 11013120311012.

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 21011302131011 - 2¹⁸ = 21011301868867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011302131013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836224886 + ... + 836250011.

It is an arithmetic number, because the mean of its divisors is an integer number (2784670705170).

Almost surely, 2^{21011302131011} is an apocalyptic number.

21011302131011 is a deficient number, since it is larger than the sum of its proper divisors (1266063510349).

21011302131011 is a wasteful number, since it uses less digits than its factorization.

21011302131011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672475653.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21011302131011 its reverse (11013120311012), we get a palindrome (32024422442023).

The spelling of 21011302131011 in words is "twenty-one trillion, eleven billion, three hundred two million, one hundred thirty-one thousand, eleven".