21001303301111 has 16 divisors (see below), whose sum is σ = 24344579616768. Its totient is φ = 17743904539200.

The previous prime is 21001303301107. The next prime is 21001303301113. The reversal of 21001303301111 is 11110330310012.

It is not a de Polignac number, because 21001303301111 - 2² = 21001303301107 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 21001303301111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001303301113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972430 + ... + 6774443.

It is an arithmetic number, because the mean of its divisors is an integer number (1521536226048).

Almost surely, 2^{21001303301111} is an apocalyptic number.

21001303301111 is a deficient number, since it is larger than the sum of its proper divisors (3343276315657).

21001303301111 is an equidigital number, since it uses as much as digits as its factorization.

21001303301111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8751782.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21001303301111 its reverse (11110330310012), we get a palindrome (32111633611123).

The spelling of 21001303301111 in words is "twenty-one trillion, one billion, three hundred three million, three hundred one thousand, one hundred eleven".