2001220022011 has 24 divisors (see below), whose sum is σ = 2405491375104. Its totient is φ = 1658308231440.

The previous prime is 2001220021981. The next prime is 2001220022041. The reversal of 2001220022011 is 1102200221002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2001220021981) and next prime (2001220022041).

It is not a de Polignac number, because 2001220022011 - 2¹¹ = 2001220019963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220021982 and 2001220022000.

It is not an unprimeable number, because it can be changed into a prime (2001220022041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 823056 + ... + 2163298.

It is an arithmetic number, because the mean of its divisors is an integer number (100228807296).

Almost surely, 2^{2001220022011} is an apocalyptic number.

2001220022011 is a deficient number, since it is larger than the sum of its proper divisors (404271353093).

2001220022011 is a wasteful number, since it uses less digits than its factorization.

2001220022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341271 (or 1341264 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001220022011 its reverse (1102200221002), we get a palindrome (3103420243013).

The spelling of 2001220022011 in words is "two trillion, one billion, two hundred twenty million, twenty-two thousand, eleven".