220021221210101 has 8 divisors (see below), whose sum is σ = 224515861466040. Its totient is φ = 215539295637952.

The previous prime is 220021221210061. The next prime is 220021221210113. The reversal of 220021221210101 is 101012122120022.

It can be written as a sum of positive squares in 4 ways, for example, as 42990904995025 + 177030316215076 = 6556745^2 + 13305274^2 .

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 220021221210101 - 2¹⁰ = 220021221209077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220021221210101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021221210121) 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, 3178635986 + ... + 3178705203.

It is an arithmetic number, because the mean of its divisors is an integer number (28064482683255).

Almost surely, 2^{220021221210101} is an apocalyptic number.

It is an amenable number.

220021221210101 is a deficient number, since it is larger than the sum of its proper divisors (4494640255939).

220021221210101 is an equidigital number, since it uses as much as digits as its factorization.

220021221210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6357341895.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220021221210101 its reverse (101012122120022), we get a palindrome (321033343330123).

The spelling of 220021221210101 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred one".