121222126506 has 16 divisors (see below), whose sum is σ = 261093811104. Its totient is φ = 37299115824.

The previous prime is 121222126489. The next prime is 121222126517. The reversal of 121222126506 is 605621222121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777064836 + ... + 777064991.

It is an arithmetic number, because the mean of its divisors is an integer number (16318363194).

Almost surely, 2^121222126506 is an apocalyptic number.

121222126506 is an abundant number, since it is smaller than the sum of its proper divisors (139871684598).

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

121222126506 is a wasteful number, since it uses less digits than its factorization.

121222126506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554129845.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 121222126506 its reverse (605621222121), we get a palindrome (726843348627).

The spelling of 121222126506 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-six thousand, five hundred six".