2201011111221 has 16 divisors (see below), whose sum is σ = 3227669324544. Its totient is φ = 1325649898944.

The previous prime is 2201011111219. The next prime is 2201011111261. The reversal of 2201011111221 is 1221111101022.

It is a happy number.

It is not a de Polignac number, because 2201011111221 - 2¹ = 2201011111219 is a prime.

It is a super-2 number, since 2×2201011111221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2201011111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201011111261) 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, 600383086 + ... + 600386751.

It is an arithmetic number, because the mean of its divisors is an integer number (201729332784).

Almost surely, 2^{2201011111221} is an apocalyptic number.

It is an amenable number.

2201011111221 is a deficient number, since it is larger than the sum of its proper divisors (1026658213323).

2201011111221 is a wasteful number, since it uses less digits than its factorization.

2201011111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200769900.

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

Adding to 2201011111221 its reverse (1221111101022), we get a palindrome (3422122212243).

The spelling of 2201011111221 in words is "two trillion, two hundred one billion, eleven million, one hundred eleven thousand, two hundred twenty-one".