2001212220211 has 8 divisors (see below), whose sum is σ = 2019954343424. Its totient is φ = 1982542321800.

The previous prime is 2001212220187. The next prime is 2001212220229. The reversal of 2001212220211 is 1120222121002.

It is a happy number.

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 2001212220211 - 2²³ = 2001203831603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001212220251) 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, 18000525 + ... + 18111358.

It is an arithmetic number, because the mean of its divisors is an integer number (252494292928).

Almost surely, 2^{2001212220211} is an apocalyptic number.

2001212220211 is a deficient number, since it is larger than the sum of its proper divisors (18742123213).

2001212220211 is a wasteful number, since it uses less digits than its factorization.

2001212220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36112401.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001212220211 its reverse (1120222121002), we get a palindrome (3121434341213).

It can be divided in two parts, 2001 and 212220211, that added together give a palindrome (212222212).

The spelling of 2001212220211 in words is "two trillion, one billion, two hundred twelve million, two hundred twenty thousand, two hundred eleven".