2001212022111 has 4 divisors (see below), whose sum is σ = 2668282696152. Its totient is φ = 1334141348072.

The previous prime is 2001212022109. The next prime is 2001212022263. The reversal of 2001212022111 is 1112202121002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001212022111 - 2¹ = 2001212022109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001212022311) 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, 333535337016 + ... + 333535337021.

It is an arithmetic number, because the mean of its divisors is an integer number (667070674038).

Almost surely, 2^{2001212022111} is an apocalyptic number.

2001212022111 is a deficient number, since it is larger than the sum of its proper divisors (667070674041).

2001212022111 is an equidigital number, since it uses as much as digits as its factorization.

2001212022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667070674040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001212022111 its reverse (1112202121002), we get a palindrome (3113414143113).

The spelling of 2001212022111 in words is "two trillion, one billion, two hundred twelve million, twenty-two thousand, one hundred eleven".