121222221011011 has 4 divisors (see below), whose sum is σ = 121227415011000. Its totient is φ = 121217027011024.

The previous prime is 121222221011009. The next prime is 121222221011029. The reversal of 121222221011011 is 110110122222121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121222221011011 - 2¹ = 121222221011009 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 121222221011011.

It is not an unprimeable number, because it can be changed into a prime (121222821011011) 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, 2596964986 + ... + 2597011663.

It is an arithmetic number, because the mean of its divisors is an integer number (30306853752750).

Almost surely, 2^{121222221011011} is an apocalyptic number.

121222221011011 is a deficient number, since it is larger than the sum of its proper divisors (5193999989).

121222221011011 is an equidigital number, since it uses as much as digits as its factorization.

121222221011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193999988.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121222221011011 its reverse (110110122222121), we get a palindrome (231332343233132).

The spelling of 121222221011011 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, eleven thousand, eleven".