2001312322221 has 32 divisors (see below), whose sum is σ = 2790446837760. Its totient is φ = 1273446574400.

The previous prime is 2001312322211. The next prime is 2001312322223. The reversal of 2001312322221 is 1222232131002.

It is a cyclic number.

It is not a de Polignac number, because 2001312322221 - 2⁶ = 2001312322157 is a prime.

It is a super-2 number, since 2×2001312322221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001312322223) 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, 61019695 + ... + 61052483.

It is an arithmetic number, because the mean of its divisors is an integer number (87201463680).

Almost surely, 2^{2001312322221} is an apocalyptic number.

It is an amenable number.

2001312322221 is a deficient number, since it is larger than the sum of its proper divisors (789134515539).

2001312322221 is a wasteful number, since it uses less digits than its factorization.

2001312322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34697.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2001312322221 its reverse (1222232131002), we get a palindrome (3223544453223).

The spelling of 2001312322221 in words is "two trillion, one billion, three hundred twelve million, three hundred twenty-two thousand, two hundred twenty-one".