12220011122221 has 16 divisors (see below), whose sum is σ = 14265537638400. Its totient is φ = 10249520626800.

The previous prime is 12220011122219. The next prime is 12220011122251. The reversal of 12220011122221 is 12222111002221.

It is not a de Polignac number, because 12220011122221 - 2¹ = 12220011122219 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 (12220011122251) 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, 1710171 + ... + 5231128.

It is an arithmetic number, because the mean of its divisors is an integer number (891596102400).

Almost surely, 2^{12220011122221} is an apocalyptic number.

It is an amenable number.

12220011122221 is a deficient number, since it is larger than the sum of its proper divisors (2045526516179).

12220011122221 is an equidigital number, since it uses as much as digits as its factorization.

12220011122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946704.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12220011122221 its reverse (12222111002221), we get a palindrome (24442122124442).

The spelling of 12220011122221 in words is "twelve trillion, two hundred twenty billion, eleven million, one hundred twenty-two thousand, two hundred twenty-one".