2210311011221 has 4 divisors (see below), whose sum is σ = 2210324124972. Its totient is φ = 2210297897472.

The previous prime is 2210311011197. The next prime is 2210311011229. The reversal of 2210311011221 is 1221101130122.

It is a happy number.

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 476838586225 + 1733472424996 = 690535^2 + 1316614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210311011221 - 2⁶ = 2210311011157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2210311011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210311011229) 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 3 ways as a sum of consecutive naturals, for example, 6300716 + ... + 6642261.

It is an arithmetic number, because the mean of its divisors is an integer number (552581031243).

Almost surely, 2^{2210311011221} is an apocalyptic number.

It is an amenable number.

2210311011221 is a deficient number, since it is larger than the sum of its proper divisors (13113751).

2210311011221 is a wasteful number, since it uses less digits than its factorization.

2210311011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13113750.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2210311011221 its reverse (1221101130122), we get a palindrome (3431412141343).

The spelling of 2210311011221 in words is "two trillion, two hundred ten billion, three hundred eleven million, eleven thousand, two hundred twenty-one".