2001321000031 has 8 divisors (see below), whose sum is σ = 2043949400064. Its totient is φ = 1958694562680.

The previous prime is 2001321000023. The next prime is 2001321000067. The reversal of 2001321000031 is 1300001231002.

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 2001321000031 - 2³ = 2001321000023 is a prime.

It is a super-2 number, since 2×2001321000031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001320999975 and 2001321000020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001321000071) 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, 1670746 + ... + 2606536.

It is an arithmetic number, because the mean of its divisors is an integer number (255493675008).

Almost surely, 2^{2001321000031} is an apocalyptic number.

2001321000031 is a deficient number, since it is larger than the sum of its proper divisors (42628400033).

2001321000031 is an equidigital number, since it uses as much as digits as its factorization.

2001321000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981341.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 2001321000031 its reverse (1300001231002), we get a palindrome (3301322231033).

The spelling of 2001321000031 in words is "two trillion, one billion, three hundred twenty-one million, thirty-one", and thus it is an aban number.