2212111012121 has 8 divisors (see below), whose sum is σ = 2243273587560. Its totient is φ = 2180971671552.

The previous prime is 2212111012103. The next prime is 2212111012123. The reversal of 2212111012121 is 1212101112122.

It can be written as a sum of positive squares in 4 ways, for example, as 1148778819721 + 1063332192400 = 1071811^2 + 1031180^2 .

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 2212111012121 - 2²⁶ = 2212043903257 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 2212111012121.

It is not an unprimeable number, because it can be changed into a prime (2212111012123) 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, 5616920 + ... + 5997833.

It is an arithmetic number, because the mean of its divisors is an integer number (280409198445).

Almost surely, 2^{2212111012121} is an apocalyptic number.

It is an amenable number.

2212111012121 is a deficient number, since it is larger than the sum of its proper divisors (31162575439).

2212111012121 is a wasteful number, since it uses less digits than its factorization.

2212111012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11617435.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2212111012121 its reverse (1212101112122), we get a palindrome (3424212124243).

The spelling of 2212111012121 in words is "two trillion, two hundred twelve billion, one hundred eleven million, twelve thousand, one hundred twenty-one".