2001321421031 has 4 divisors (see below), whose sum is σ = 2001345549072. Its totient is φ = 2001297292992.

The previous prime is 2001321421013. The next prime is 2001321421081. The reversal of 2001321421031 is 1301241231002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001321421031 is a prime.

It is a super-2 number, since 2×2001321421031² (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 = 2001321420994 and 2001321421012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001321421081) 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, 11939171 + ... + 12105636.

It is an arithmetic number, because the mean of its divisors is an integer number (500336387268).

Almost surely, 2^{2001321421031} is an apocalyptic number.

2001321421031 is a deficient number, since it is larger than the sum of its proper divisors (24128041).

2001321421031 is an equidigital number, since it uses as much as digits as its factorization.

2001321421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24128040.

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

Adding to 2001321421031 its reverse (1301241231002), we get a palindrome (3302562652033).

The spelling of 2001321421031 in words is "two trillion, one billion, three hundred twenty-one million, four hundred twenty-one thousand, thirty-one".