220000000211221 has 8 divisors (see below), whose sum is σ = 232947817420824. Its totient is φ = 207052920860160.

The previous prime is 220000000211021. The next prime is 220000000211261. The reversal of 220000000211221 is 122112000000022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 100808849010321 + 119191151200900 = 10040361^2 + 10917470^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 220000000211221 - 2¹¹ = 220000000209173 is a prime.

It is a super-2 number, since 2×220000000211221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220000000211261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183850710 + ... + 185043463.

It is an arithmetic number, because the mean of its divisors is an integer number (29118477177603).

Almost surely, 2^{220000000211221} is an apocalyptic number.

It is an amenable number.

220000000211221 is a deficient number, since it is larger than the sum of its proper divisors (12947817209603).

220000000211221 is a wasteful number, since it uses less digits than its factorization.

220000000211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368929271.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220000000211221 its reverse (122112000000022), we get a palindrome (342112000211243).

The spelling of 220000000211221 in words is "two hundred twenty trillion, two hundred eleven thousand, two hundred twenty-one".