21021011211301 has 12 divisors (see below), whose sum is σ = 23267335225932. Its totient is φ = 18924286299776.

The previous prime is 21021011211253. The next prime is 21021011211313. The reversal of 21021011211301 is 10311211012012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17980364586276 + 3040646625025 = 4240326^2 + 1743745^2 .

It is not a de Polignac number, because 21021011211301 - 2¹³ = 21021011203109 is a prime.

It is a super-2 number, since 2×21021011211301² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021011211341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1168733986 + ... + 1168751971.

It is an arithmetic number, because the mean of its divisors is an integer number (1938944602161).

Almost surely, 2^{21021011211301} is an apocalyptic number.

It is an amenable number.

21021011211301 is a deficient number, since it is larger than the sum of its proper divisors (2246324014631).

21021011211301 is a wasteful number, since it uses less digits than its factorization.

21021011211301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337486020 (or 2337485997 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21021011211301 its reverse (10311211012012), we get a palindrome (31332222223313).

The spelling of 21021011211301 in words is "twenty-one trillion, twenty-one billion, eleven million, two hundred eleven thousand, three hundred one".