121917453064 has 64 divisors (see below), whose sum is σ = 263862504000. Its totient is φ = 52228177920.

The previous prime is 121917452971. The next prime is 121917453071. The reversal of 121917453064 is 460354719121.

It is a happy number.

It is a super-2 number, since 2×121917453064² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121917453064.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133792 + ... + 511600.

It is an arithmetic number, because the mean of its divisors is an integer number (4122851625).

Almost surely, 2^121917453064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121917453064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131931252000).

121917453064 is an abundant number, since it is smaller than the sum of its proper divisors (141945050936).

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

121917453064 is a wasteful number, since it uses less digits than its factorization.

121917453064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378038 (or 378034 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 121917453064 in words is "one hundred twenty-one billion, nine hundred seventeen million, four hundred fifty-three thousand, sixty-four".