220001210202221 has 8 divisors (see below), whose sum is σ = 251430054927744. Its totient is φ = 188572390579440.

The previous prime is 220001210202217. The next prime is 220001210202229. The reversal of 220001210202221 is 122202012100022.

It is a happy number.

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

It is not a de Polignac number, because 220001210202221 - 2² = 220001210202217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220001210202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001210202229) 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, 19637891 + ... + 28734111.

It is an arithmetic number, because the mean of its divisors is an integer number (31428756865968).

Almost surely, 2^{220001210202221} is an apocalyptic number.

It is an amenable number.

220001210202221 is a deficient number, since it is larger than the sum of its proper divisors (31428844725523).

220001210202221 is an equidigital number, since it uses as much as digits as its factorization.

220001210202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551371.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220001210202221 its reverse (122202012100022), we get a palindrome (342203222302243).

The spelling of 220001210202221 in words is "two hundred twenty trillion, one billion, two hundred ten million, two hundred two thousand, two hundred twenty-one".