21311002332201 has 4 divisors (see below), whose sum is σ = 28414669776272. Its totient is φ = 14207334888132.

The previous prime is 21311002332197. The next prime is 21311002332227. The reversal of 21311002332201 is 10223320011312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21311002332201 - 2² = 21311002332197 is a prime.

It is a super-2 number, since 2×21311002332201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311002332241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3551833722031 + ... + 3551833722036.

It is an arithmetic number, because the mean of its divisors is an integer number (7103667444068).

Almost surely, 2^{21311002332201} is an apocalyptic number.

It is an amenable number.

21311002332201 is a deficient number, since it is larger than the sum of its proper divisors (7103667444071).

21311002332201 is an equidigital number, since it uses as much as digits as its factorization.

21311002332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103667444070.

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

Adding to 21311002332201 its reverse (10223320011312), we get a palindrome (31534322343513).

The spelling of 21311002332201 in words is "twenty-one trillion, three hundred eleven billion, two million, three hundred thirty-two thousand, two hundred one".