21331032121201 has 16 divisors (see below), whose sum is σ = 23330957368320. Its totient is φ = 19341279397120.

The previous prime is 21331032121199. The next prime is 21331032121241. The reversal of 21331032121201 is 10212123013312.

It is a cyclic number.

It is not a de Polignac number, because 21331032121201 - 2¹ = 21331032121199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331032121241) 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, 7468656 + ... + 9921838.

It is an arithmetic number, because the mean of its divisors is an integer number (1458184835520).

Almost surely, 2^{21331032121201} is an apocalyptic number.

It is an amenable number.

21331032121201 is a deficient number, since it is larger than the sum of its proper divisors (1999925247119).

21331032121201 is a wasteful number, since it uses less digits than its factorization.

21331032121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455256.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21331032121201 its reverse (10212123013312), we get a palindrome (31543155134513).

The spelling of 21331032121201 in words is "twenty-one trillion, three hundred thirty-one billion, thirty-two million, one hundred twenty-one thousand, two hundred one".