21001323212301 has 32 divisors (see below), whose sum is σ = 28456298956800. Its totient is φ = 13775570424000.

The previous prime is 21001323212297. The next prime is 21001323212321. The reversal of 21001323212301 is 10321232310012.

It is not a de Polignac number, because 21001323212301 - 2² = 21001323212297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001323212321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42861586 + ... + 43348796.

It is an arithmetic number, because the mean of its divisors is an integer number (889259342400).

Almost surely, 2^{21001323212301} is an apocalyptic number.

It is an amenable number.

21001323212301 is a deficient number, since it is larger than the sum of its proper divisors (7454975744499).

21001323212301 is a wasteful number, since it uses less digits than its factorization.

21001323212301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488217.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21001323212301 its reverse (10321232310012), we get a palindrome (31322555522313).

The spelling of 21001323212301 in words is "twenty-one trillion, one billion, three hundred twenty-three million, two hundred twelve thousand, three hundred one".