121217067072 has 168 divisors, whose sum is σ = 363226234176. Its totient is φ = 38577183744.

The previous prime is 121217067031. The next prime is 121217067151. The reversal of 121217067072 is 270760712121.

It is a super-3 number, since 3×121217067072³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7370923 + ... + 7387349.

Almost surely, 2^121217067072 is an apocalyptic number.

121217067072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121217067072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181613117088).

121217067072 is an abundant number, since it is smaller than the sum of its proper divisors (242009167104).

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

121217067072 is a wasteful number, since it uses less digits than its factorization.

121217067072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17025 (or 17012 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

Adding to 121217067072 its reverse (270760712121), we get a palindrome (391977779193).

The spelling of 121217067072 in words is "one hundred twenty-one billion, two hundred seventeen million, sixty-seven thousand, seventy-two".