220121332201 has 4 divisors (see below), whose sum is σ = 220123094404. Its totient is φ = 220119570000.

The previous prime is 220121332181. The next prime is 220121332213. The reversal of 220121332201 is 102233121022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102233121022 = 2 ⋅51116560511.

It can be written as a sum of positive squares in 2 ways, for example, as 57744570601 + 162376761600 = 240301^2 + 402960^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121332201 - 2¹¹ = 220121330153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121332601) 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 3 ways as a sum of consecutive naturals, for example, 678150 + ... + 948751.

It is an arithmetic number, because the mean of its divisors is an integer number (55030773601).

Almost surely, 2^220121332201 is an apocalyptic number.

It is an amenable number.

220121332201 is a deficient number, since it is larger than the sum of its proper divisors (1762203).

220121332201 is a wasteful number, since it uses less digits than its factorization.

220121332201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762202.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 220121332201 its reverse (102233121022), we get a palindrome (322354453223).

The spelling of 220121332201 in words is "two hundred twenty billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred one".