2011221211101 has 4 divisors (see below), whose sum is σ = 2681628281472. Its totient is φ = 1340814140732.

The previous prime is 2011221211099. The next prime is 2011221211141. The reversal of 2011221211101 is 1011121221102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2011221211101 - 2¹ = 2011221211099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011221211141) 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, 335203535181 + ... + 335203535186.

It is an arithmetic number, because the mean of its divisors is an integer number (670407070368).

Almost surely, 2^{2011221211101} is an apocalyptic number.

It is an amenable number.

2011221211101 is a deficient number, since it is larger than the sum of its proper divisors (670407070371).

2011221211101 is an equidigital number, since it uses as much as digits as its factorization.

2011221211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670407070370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2011221211101 its reverse (1011121221102), we get a palindrome (3022342432203).

The spelling of 2011221211101 in words is "two trillion, eleven billion, two hundred twenty-one million, two hundred eleven thousand, one hundred one".