2121212120122 has 8 divisors (see below), whose sum is σ = 3195020745972. Its totient is φ = 1056205204800.

The previous prime is 2121212120119. The next prime is 2121212120171. The reversal of 2121212120122 is 2210212121212.

It can be written as a sum of positive squares in 2 ways, for example, as 1727492264281 + 393719855841 = 1314341^2 + 627471^2 .

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 2121212120122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200427029 + ... + 2200427992.

Almost surely, 2^{2121212120122} is an apocalyptic number.

2121212120122 is a deficient number, since it is larger than the sum of its proper divisors (1073808625850).

2121212120122 is a wasteful number, since it uses less digits than its factorization.

2121212120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400855264.

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

Adding to 2121212120122 its reverse (2210212121212), we get a palindrome (4331424241334).

The spelling of 2121212120122 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-two".