2212202023121 has 4 divisors (see below), whose sum is σ = 2213918240100. Its totient is φ = 2210485806144.

The previous prime is 2212202023069. The next prime is 2212202023147. The reversal of 2212202023121 is 1213202022122.

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 1605633642496 + 606568380625 = 1267136^2 + 778825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212202023121 - 2³⁴ = 2195022153937 is a prime.

It is a super-2 number, since 2×2212202023121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212202023093 and 2212202023102.

It is not an unprimeable number, because it can be changed into a prime (2212202023021) 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, 858106556 + ... + 858109133.

It is an arithmetic number, because the mean of its divisors is an integer number (553479560025).

Almost surely, 2^{2212202023121} is an apocalyptic number.

It is an amenable number.

2212202023121 is a deficient number, since it is larger than the sum of its proper divisors (1716216979).

2212202023121 is a wasteful number, since it uses less digits than its factorization.

2212202023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716216978.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2212202023121 its reverse (1213202022122), we get a palindrome (3425404045243).

Subtracting from 2212202023121 its reverse (1213202022122), we obtain a palindrome (999000000999).

The spelling of 2212202023121 in words is "two trillion, two hundred twelve billion, two hundred two million, twenty-three thousand, one hundred twenty-one".