2011012110221 has 16 divisors (see below), whose sum is σ = 2153025520704. Its totient is φ = 1871696957184.

The previous prime is 2011012110181. The next prime is 2011012110269. The reversal of 2011012110221 is 1220112101102.

It is a cyclic number.

It is not a de Polignac number, because 2011012110221 - 2²⁶ = 2010945001357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011012110196 and 2011012110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011012110271) 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, 42251 + ... + 2005943.

It is an arithmetic number, because the mean of its divisors is an integer number (134564095044).

Almost surely, 2^{2011012110221} is an apocalyptic number.

It is an amenable number.

2011012110221 is a deficient number, since it is larger than the sum of its proper divisors (142013410483).

2011012110221 is a wasteful number, since it uses less digits than its factorization.

2011012110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964380.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011012110221 its reverse (1220112101102), we get a palindrome (3231124211323).

The spelling of 2011012110221 in words is "two trillion, eleven billion, twelve million, one hundred ten thousand, two hundred twenty-one".