2011105101221 has 4 divisors (see below), whose sum is σ = 2098544453472. Its totient is φ = 1923665748972.

The previous prime is 2011105101217. The next prime is 2011105101281. The reversal of 2011105101221 is 1221015011102.

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 2011105101221 - 2² = 2011105101217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011105101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011105101211) 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, 43719676091 + ... + 43719676136.

It is an arithmetic number, because the mean of its divisors is an integer number (524636113368).

Almost surely, 2^{2011105101221} is an apocalyptic number.

It is an amenable number.

2011105101221 is a deficient number, since it is larger than the sum of its proper divisors (87439352251).

2011105101221 is an equidigital number, since it uses as much as digits as its factorization.

2011105101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87439352250.

The product of its (nonzero) digits is 40, while the sum is 17.

The spelling of 2011105101221 in words is "two trillion, eleven billion, one hundred five million, one hundred one thousand, two hundred twenty-one".