220220210012221 has 8 divisors (see below), whose sum is σ = 227895693485400. Its totient is φ = 212550172080960.

The previous prime is 220220210012161. The next prime is 220220210012237. The reversal of 220220210012221 is 122210012022022.

It can be written as a sum of positive squares in 4 ways, for example, as 95576628268900 + 124643581743321 = 9776330^2 + 11164389^2 .

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 220220210012221 - 2⁷ = 220220210012093 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 (220220210012321) 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, 1361303190 + ... + 1361464951.

It is an arithmetic number, because the mean of its divisors is an integer number (28486961685675).

Almost surely, 2^{220220210012221} is an apocalyptic number.

It is an amenable number.

220220210012221 is a deficient number, since it is larger than the sum of its proper divisors (7675483473179).

220220210012221 is a wasteful number, since it uses less digits than its factorization.

220220210012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722770959.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 220220210012221 its reverse (122210012022022), we get a palindrome (342430222034243).

The spelling of 220220210012221 in words is "two hundred twenty trillion, two hundred twenty billion, two hundred ten million, twelve thousand, two hundred twenty-one".