2001321212011 has 32 divisors (see below), whose sum is σ = 2313987540480. Its totient is φ = 1711767168000.

The previous prime is 2001321211993. The next prime is 2001321212029. The reversal of 2001321212011 is 1102121231002.

It is an interprime number because it is at equal distance from previous prime (2001321211993) and next prime (2001321212029).

It is a cyclic number.

It is not a de Polignac number, because 2001321212011 - 2²⁷ = 2001186994283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001321212911) 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, 194808571 + ... + 194818843.

It is an arithmetic number, because the mean of its divisors is an integer number (72312110640).

Almost surely, 2^{2001321212011} is an apocalyptic number.

2001321212011 is a deficient number, since it is larger than the sum of its proper divisors (312666328469).

2001321212011 is a wasteful number, since it uses less digits than its factorization.

2001321212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16627.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2001321212011 its reverse (1102121231002), we get a palindrome (3103442443013).

The spelling of 2001321212011 in words is "two trillion, one billion, three hundred twenty-one million, two hundred twelve thousand, eleven".