2210122121221 has 16 divisors (see below), whose sum is σ = 2540674224000. Its totient is φ = 1883277010368.

The previous prime is 2210122121219. The next prime is 2210122121237. The reversal of 2210122121221 is 1221212210122.

It is a cyclic number.

It is not a de Polignac number, because 2210122121221 - 2¹ = 2210122121219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210122121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15111955 + ... + 15257503.

It is an arithmetic number, because the mean of its divisors is an integer number (158792139000).

Almost surely, 2^{2210122121221} is an apocalyptic number.

It is an amenable number.

2210122121221 is a deficient number, since it is larger than the sum of its proper divisors (330552102779).

2210122121221 is a wasteful number, since it uses less digits than its factorization.

2210122121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158268.

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

Adding to 2210122121221 its reverse (1221212210122), we get a palindrome (3431334331343).

The spelling of 2210122121221 in words is "two trillion, two hundred ten billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".