2210122212121 has 4 divisors (see below), whose sum is σ = 2210128280100. Its totient is φ = 2210116144144.

The previous prime is 2210122212041. The next prime is 2210122212143. The reversal of 2210122212121 is 1212122210122.

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 1870890518025 + 339231694096 = 1367805^2 + 582436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210122212121 - 2¹¹ = 2210122210073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2210122212161) 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, 2450206 + ... + 3228583.

It is an arithmetic number, because the mean of its divisors is an integer number (552532070025).

Almost surely, 2^{2210122212121} is an apocalyptic number.

It is an amenable number.

2210122212121 is a deficient number, since it is larger than the sum of its proper divisors (6067979).

2210122212121 is an equidigital number, since it uses as much as digits as its factorization.

2210122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6067978.

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

Adding to 2210122212121 its reverse (1212122210122), we get a palindrome (3422244422243).

The spelling of 2210122212121 in words is "two trillion, two hundred ten billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".