220121101221 has 8 divisors (see below), whose sum is σ = 335422630464. Its totient is φ = 125783486400.

The previous prime is 220121101183. The next prime is 220121101237. The reversal of 220121101221 is 122101121022.

220121101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220121101221 - 2¹¹ = 220121099173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220121101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121121221) 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 7 ways as a sum of consecutive naturals, for example, 5240978580 + ... + 5240978621.

It is an arithmetic number, because the mean of its divisors is an integer number (41927828808).

Almost surely, 2^220121101221 is an apocalyptic number.

220121101221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220121101221 is a deficient number, since it is larger than the sum of its proper divisors (115301529243).

220121101221 is a wasteful number, since it uses less digits than its factorization.

220121101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481957211.

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

Adding to 220121101221 its reverse (122101121022), we get a palindrome (342222222243).

The spelling of 220121101221 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-one".