2001212212001 has 8 divisors (see below), whose sum is σ = 2006820119040. Its totient is φ = 1995609075552.

The previous prime is 2001212211979. The next prime is 2001212212039. The reversal of 2001212212001 is 1002122121002.

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 2001212212001 - 2¹⁸ = 2001211949857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001212212061) 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, 351665 + ... + 2031278.

It is an arithmetic number, because the mean of its divisors is an integer number (250852514880).

Almost surely, 2^{2001212212001} is an apocalyptic number.

It is an amenable number.

2001212212001 is a deficient number, since it is larger than the sum of its proper divisors (5607907039).

2001212212001 is a wasteful number, since it uses less digits than its factorization.

2001212212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385295.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001212212001 its reverse (1002122121002), we get a palindrome (3003334333003).

Subtracting from 2001212212001 its reverse (1002122121002), we obtain a palindrome (999090090999).

The spelling of 2001212212001 in words is "two trillion, one billion, two hundred twelve million, two hundred twelve thousand, one".