2121112221202 has 8 divisors (see below), whose sum is σ = 3426412049676. Its totient is φ = 978974871312.

The previous prime is 2121112221161. The next prime is 2121112221229. The reversal of 2121112221202 is 2021222111212.

It can be written as a sum of positive squares in 2 ways, for example, as 1937243638801 + 183868582401 = 1391849^2 + 428799^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2121112221202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40790619613 + ... + 40790619664.

Almost surely, 2^{2121112221202} is an apocalyptic number.

2121112221202 is a deficient number, since it is larger than the sum of its proper divisors (1305299828474).

2121112221202 is a wasteful number, since it uses less digits than its factorization.

2121112221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81581239292.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121112221202 its reverse (2021222111212), we get a palindrome (4142334332414).

The spelling of 2121112221202 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred two".