21001201222331 has 8 divisors (see below), whose sum is σ = 22970219618304. Its totient is φ = 19042152540520.

The previous prime is 21001201222319. The next prime is 21001201222373. The reversal of 21001201222331 is 13322210210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21001201222331 - 2²⁶ = 21001134113467 is a prime.

It is a super-2 number, since 2×21001201222331² (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 (21001201222381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2492424131 + ... + 2492432556.

It is an arithmetic number, because the mean of its divisors is an integer number (2871277452288).

Almost surely, 2^{21001201222331} is an apocalyptic number.

21001201222331 is a deficient number, since it is larger than the sum of its proper divisors (1969018395973).

21001201222331 is a wasteful number, since it uses less digits than its factorization.

21001201222331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984857081.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21001201222331 its reverse (13322210210012), we get a palindrome (34323411432343).

The spelling of 21001201222331 in words is "twenty-one trillion, one billion, two hundred one million, two hundred twenty-two thousand, three hundred thirty-one".