2011100201221 has 4 divisors (see below), whose sum is σ = 2012175082944. Its totient is φ = 2010025319500.

The previous prime is 2011100201191. The next prime is 2011100201239. The reversal of 2011100201221 is 1221020011102.

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 2011100201221 - 2⁹ = 2011100200709 is a prime.

It is a super-2 number, since 2×2011100201221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011100201821) 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, 537438055 + ... + 537441796.

It is an arithmetic number, because the mean of its divisors is an integer number (503043770736).

Almost surely, 2^{2011100201221} is an apocalyptic number.

It is an amenable number.

2011100201221 is a deficient number, since it is larger than the sum of its proper divisors (1074881723).

2011100201221 is a wasteful number, since it uses less digits than its factorization.

2011100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074881722.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2011100201221 its reverse (1221020011102), we get a palindrome (3232120212323).

The spelling of 2011100201221 in words is "two trillion, eleven billion, one hundred million, two hundred one thousand, two hundred twenty-one".