121222101211211 has 32 divisors (see below), whose sum is σ = 168372149299200. Its totient is φ = 84186074609280.

The previous prime is 121222101211199. The next prime is 121222101211213. The reversal of 121222101211211 is 112112101222121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121222101211211 is a prime.

It is a super-2 number, since 2×121222101211211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121222101211213) 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 31 ways as a sum of consecutive naturals, for example, 2087919251 + ... + 2087977308.

It is an arithmetic number, because the mean of its divisors is an integer number (5261629665600).

Almost surely, 2^{121222101211211} is an apocalyptic number.

121222101211211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121222101211211 is a deficient number, since it is larger than the sum of its proper divisors (47150048087989).

121222101211211 is a wasteful number, since it uses less digits than its factorization.

121222101211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175896619.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121222101211211 its reverse (112112101222121), we get a palindrome (233334202433332).

The spelling of 121222101211211 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred one million, two hundred eleven thousand, two hundred eleven".