121716971418 has 32 divisors (see below), whose sum is σ = 279917047296. Its totient is φ = 34562924208.

The previous prime is 121716971417. The next prime is 121716971437. The reversal of 121716971418 is 814179617121.

It is a super-2 number, since 2×121716971418² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121716971417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8882796 + ... + 8896487.

It is an arithmetic number, because the mean of its divisors is an integer number (8747407728).

Almost surely, 2^121716971418 is an apocalyptic number.

121716971418 is an abundant number, since it is smaller than the sum of its proper divisors (158200075878).

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

121716971418 is a wasteful number, since it uses less digits than its factorization.

121716971418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17779458.

The product of its digits is 169344, while the sum is 48.

The spelling of 121716971418 in words is "one hundred twenty-one billion, seven hundred sixteen million, nine hundred seventy-one thousand, four hundred eighteen".