2001122021011 has 4 divisors (see below), whose sum is σ = 2049929875224. Its totient is φ = 1952314166800.

The previous prime is 2001122020999. The next prime is 2001122021057. The reversal of 2001122021011 is 1101202211002.

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 2001122021011 - 2¹⁷ = 2001121889939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001122020982 and 2001122021000.

It is not an unprimeable number, because it can be changed into a prime (2001122621011) 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, 24403927045 + ... + 24403927126.

It is an arithmetic number, because the mean of its divisors is an integer number (512482468806).

Almost surely, 2^{2001122021011} is an apocalyptic number.

2001122021011 is a deficient number, since it is larger than the sum of its proper divisors (48807854213).

2001122021011 is an equidigital number, since it uses as much as digits as its factorization.

2001122021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48807854212.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001122021011 its reverse (1101202211002), we get a palindrome (3102324232013).

The spelling of 2001122021011 in words is "two trillion, one billion, one hundred twenty-two million, twenty-one thousand, eleven".