2211102331221 has 32 divisors (see below), whose sum is σ = 3650457811968. Its totient is φ = 1161509287680.

The previous prime is 2211102331213. The next prime is 2211102331297. The reversal of 2211102331221 is 1221332011122.

It is not a de Polignac number, because 2211102331221 - 2³ = 2211102331213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211102331201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72002835 + ... + 72033536.

It is an arithmetic number, because the mean of its divisors is an integer number (114076806624).

Almost surely, 2^{2211102331221} is an apocalyptic number.

2211102331221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2211102331221 is a deficient number, since it is larger than the sum of its proper divisors (1439355480747).

2211102331221 is a wasteful number, since it uses less digits than its factorization.

2211102331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144036441.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2211102331221 its reverse (1221332011122), we get a palindrome (3432434342343).

The spelling of 2211102331221 in words is "two trillion, two hundred eleven billion, one hundred two million, three hundred thirty-one thousand, two hundred twenty-one".