2011221220101 has 16 divisors (see below), whose sum is σ = 2778477359424. Its totient is φ = 1293030998784.

The previous prime is 2011221220097. The next prime is 2011221220109. The reversal of 2011221220101 is 1010221221102.

It is not a de Polignac number, because 2011221220101 - 2² = 2011221220097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221220109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80160511 + ... + 80185596.

It is an arithmetic number, because the mean of its divisors is an integer number (173654834964).

Almost surely, 2^{2011221220101} is an apocalyptic number.

It is an amenable number.

2011221220101 is a deficient number, since it is larger than the sum of its proper divisors (767256139323).

2011221220101 is a wasteful number, since it uses less digits than its factorization.

2011221220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160346260.

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

Adding to 2011221220101 its reverse (1010221221102), we get a palindrome (3021442441203).

It can be divided in two parts, 2011221 and 220101, that added together give a palindrome (2231322).

The spelling of 2011221220101 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred one".