2210122221221 has 4 divisors (see below), whose sum is σ = 2211671011872. Its totient is φ = 2208573430572.

The previous prime is 2210122221217. The next prime is 2210122221269. The reversal of 2210122221221 is 1221222210122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2210122221221 - 2² = 2210122221217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210122221193 and 2210122221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210122221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774393185 + ... + 774396038.

It is an arithmetic number, because the mean of its divisors is an integer number (552917752968).

Almost surely, 2^{2210122221221} is an apocalyptic number.

It is an amenable number.

2210122221221 is a deficient number, since it is larger than the sum of its proper divisors (1548790651).

2210122221221 is a wasteful number, since it uses less digits than its factorization.

2210122221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548790650.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2210122221221 its reverse (1221222210122), we get a palindrome (3431344431343).

The spelling of 2210122221221 in words is "two trillion, two hundred ten billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".