2011012120221 has 16 divisors (see below), whose sum is σ = 2895146612736. Its totient is φ = 1234314720576.

The previous prime is 2011012120213. The next prime is 2011012120231. The reversal of 2011012120221 is 1220212101102.

It is not a de Polignac number, because 2011012120221 - 2³ = 2011012120213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011012120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011012120231) 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, 67301530 + ... + 67331403.

It is an arithmetic number, because the mean of its divisors is an integer number (180946663296).

Almost surely, 2^{2011012120221} is an apocalyptic number.

It is an amenable number.

2011012120221 is a deficient number, since it is larger than the sum of its proper divisors (884134492515).

2011012120221 is a wasteful number, since it uses less digits than its factorization.

2011012120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134633332.

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

Adding to 2011012120221 its reverse (1220212101102), we get a palindrome (3231224221323).

The spelling of 2011012120221 in words is "two trillion, eleven billion, twelve million, one hundred twenty thousand, two hundred twenty-one".