2011212221101 has 4 divisors (see below), whose sum is σ = 2011226133852. Its totient is φ = 2011198308352.

The previous prime is 2011212221093. The next prime is 2011212221111. The reversal of 2011212221101 is 1011222121102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1594285022500 + 416927198601 = 1262650^2 + 645699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011212221101 - 2³ = 2011212221093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011212221111) 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, 6737236 + ... + 7029421.

It is an arithmetic number, because the mean of its divisors is an integer number (502806533463).

Almost surely, 2^{2011212221101} is an apocalyptic number.

It is an amenable number.

2011212221101 is a deficient number, since it is larger than the sum of its proper divisors (13912751).

2011212221101 is a wasteful number, since it uses less digits than its factorization.

2011212221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13912750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2011212221101 its reverse (1011222121102), we get a palindrome (3022434342203).

Subtracting from 2011212221101 its reverse (1011222121102), we obtain a palindrome (999990099999).

The spelling of 2011212221101 in words is "two trillion, eleven billion, two hundred twelve million, two hundred twenty-one thousand, one hundred one".