21220111223301 has 16 divisors (see below), whose sum is σ = 28342126856960. Its totient is φ = 14122439078400.

The previous prime is 21220111223291. The next prime is 21220111223357. The reversal of 21220111223301 is 10332211102212.

It is not a de Polignac number, because 21220111223301 - 2¹⁸ = 21220110961157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220111223401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459476 + ... + 6676098.

It is an arithmetic number, because the mean of its divisors is an integer number (1771382928560).

Almost surely, 2^{21220111223301} is an apocalyptic number.

It is an amenable number.

21220111223301 is a deficient number, since it is larger than the sum of its proper divisors (7122015633659).

21220111223301 is a wasteful number, since it uses less digits than its factorization.

21220111223301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218956.

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

Adding to 21220111223301 its reverse (10332211102212), we get a palindrome (31552322325513).

The spelling of 21220111223301 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-three thousand, three hundred one".