220102222121 has 8 divisors (see below), whose sum is σ = 225599262504. Its totient is φ = 214611310080.

The previous prime is 220102222117. The next prime is 220102222133. The reversal of 220102222121 is 121222201022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60485991721 + 159616230400 = 245939^2 + 399520^2 .

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 220102222121 - 2² = 220102222117 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 220102222121.

It is not an unprimeable number, because it can be changed into a prime (220102222721) 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, 1459316 + ... + 1603061.

It is an arithmetic number, because the mean of its divisors is an integer number (28199907813).

Almost surely, 2^220102222121 is an apocalyptic number.

It is an amenable number.

220102222121 is a deficient number, since it is larger than the sum of its proper divisors (5497040383).

220102222121 is a wasteful number, since it uses less digits than its factorization.

220102222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064171.

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

Adding to 220102222121 its reverse (121222201022), we get a palindrome (341324423143).

The spelling of 220102222121 in words is "two hundred twenty billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".