2211020011221 has 16 divisors (see below), whose sum is σ = 3371267356800. Its totient is φ = 1262654754048.

The previous prime is 2211020011181. The next prime is 2211020011223. The reversal of 2211020011221 is 1221100201122.

It is not a de Polignac number, because 2211020011221 - 2⁶ = 2211020011157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211020011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211020011223) 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, 32684256 + ... + 32751833.

It is an arithmetic number, because the mean of its divisors is an integer number (210704209800).

Almost surely, 2^{2211020011221} is an apocalyptic number.

2211020011221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2211020011221 is a deficient number, since it is larger than the sum of its proper divisors (1160247345579).

2211020011221 is a wasteful number, since it uses less digits than its factorization.

2211020011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65437708.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2211020011221 its reverse (1221100201122), we get a palindrome (3432120212343).

The spelling of 2211020011221 in words is "two trillion, two hundred eleven billion, twenty million, eleven thousand, two hundred twenty-one".