21323111301021 has 16 divisors (see below), whose sum is σ = 29694117441600. Its totient is φ = 13596780083328.

The previous prime is 21323111301007. The next prime is 21323111301097. The reversal of 21323111301021 is 12010311132312.

It is not a de Polignac number, because 21323111301021 - 2¹³ = 21323111292829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323111300021) 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, 1627960416 + ... + 1627973513.

It is an arithmetic number, because the mean of its divisors is an integer number (1855882340100).

Almost surely, 2^{21323111301021} is an apocalyptic number.

It is an amenable number.

21323111301021 is a deficient number, since it is larger than the sum of its proper divisors (8371006140579).

21323111301021 is a wasteful number, since it uses less digits than its factorization.

21323111301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255934028.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21323111301021 its reverse (12010311132312), we get a palindrome (33333422433333).

The spelling of 21323111301021 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred eleven million, three hundred one thousand, twenty-one".