2210111212121 has 4 divisors (see below), whose sum is σ = 2211634377744. Its totient is φ = 2208588046500.

The previous prime is 2210111212093. The next prime is 2210111212163. The reversal of 2210111212121 is 1212121110122.

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 2210111212121 - 2²² = 2210107017817 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 2210111212121.

It is not an unprimeable number, because it can be changed into a prime (2210111212171) 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, 761580635 + ... + 761583536.

It is an arithmetic number, because the mean of its divisors is an integer number (552908594436).

Almost surely, 2^{2210111212121} is an apocalyptic number.

It is an amenable number.

2210111212121 is a deficient number, since it is larger than the sum of its proper divisors (1523165623).

2210111212121 is a wasteful number, since it uses less digits than its factorization.

2210111212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523165622.

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

Adding to 2210111212121 its reverse (1212121110122), we get a palindrome (3422232322243).

The spelling of 2210111212121 in words is "two trillion, two hundred ten billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty-one".