1221212210122 has 8 divisors (see below), whose sum is σ = 1890909228672. Its totient is φ = 590909133900.

The previous prime is 1221212210077. The next prime is 1221212210149. The reversal of 1221212210122 is 2210122121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1221212210122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9848485504 + ... + 9848485627.

It is an arithmetic number, because the mean of its divisors is an integer number (236363653584).

Almost surely, 2^{1221212210122} is an apocalyptic number.

1221212210122 is a deficient number, since it is larger than the sum of its proper divisors (669697018550).

1221212210122 is a wasteful number, since it uses less digits than its factorization.

1221212210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19696971164.

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

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

The spelling of 1221212210122 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-two".