2122212100121 has 4 divisors (see below), whose sum is σ = 2136455134500. Its totient is φ = 2107969065744.

The previous prime is 2122212100033. The next prime is 2122212100171. The reversal of 2122212100121 is 1210012122212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267614809225 + 1854597290896 = 517315^2 + 1361836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122212100121 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 2122212100121.

It is not an unprimeable number, because it can be changed into a prime (2122212100171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7121516966 + ... + 7121517263.

It is an arithmetic number, because the mean of its divisors is an integer number (534113783625).

Almost surely, 2^{2122212100121} is an apocalyptic number.

It is an amenable number.

2122212100121 is a deficient number, since it is larger than the sum of its proper divisors (14243034379).

2122212100121 is a wasteful number, since it uses less digits than its factorization.

2122212100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243034378.

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

Adding to 2122212100121 its reverse (1210012122212), we get a palindrome (3332224222333).

The spelling of 2122212100121 in words is "two trillion, one hundred twenty-two billion, two hundred twelve million, one hundred thousand, one hundred twenty-one".