121231101222222 has 16 divisors (see below), whose sum is σ = 256724684941392. Its totient is φ = 38033286657920.

The previous prime is 121231101222167. The next prime is 121231101222227. The reversal of 121231101222222 is 222222101132121.

It is a junction number, because it is equal to n+sod(n) for n = 121231101222192 and 121231101222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231101222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594270103929 + ... + 594270104132.

It is an arithmetic number, because the mean of its divisors is an integer number (16045292808837).

Almost surely, 2^{121231101222222} is an apocalyptic number.

121231101222222 is an abundant number, since it is smaller than the sum of its proper divisors (135493583719170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121231101222222 is a wasteful number, since it uses less digits than its factorization.

121231101222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188540208083.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 121231101222222 its reverse (222222101132121), we get a palindrome (343453202354343).

The spelling of 121231101222222 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, one hundred one million, two hundred twenty-two thousand, two hundred twenty-two".