2102202220121 has 8 divisors (see below), whose sum is σ = 2247104813184. Its totient is φ = 1961758168480.

The previous prime is 2102202220061. The next prime is 2102202220123. The reversal of 2102202220121 is 1210222022012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102202220121 is a prime.

It is a super-2 number, since 2×2102202220121² (a number of 25 digits) contains 22 as substring.

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 2102202220121.

It is not an unprimeable number, because it can be changed into a prime (2102202220123) 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, 1114634381 + ... + 1114636266.

It is an arithmetic number, because the mean of its divisors is an integer number (280888101648).

Almost surely, 2^{2102202220121} is an apocalyptic number.

It is an amenable number.

2102202220121 is a deficient number, since it is larger than the sum of its proper divisors (144902593063).

2102202220121 is a wasteful number, since it uses less digits than its factorization.

2102202220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229270711.

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

Adding to 2102202220121 its reverse (1210222022012), we get a palindrome (3312424242133).

The spelling of 2102202220121 in words is "two trillion, one hundred two billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".