121889454729 has 8 divisors (see below), whose sum is σ = 185736312000. Its totient is φ = 69651116976.

The previous prime is 121889454727. The next prime is 121889454737. The reversal of 121889454729 is 927454988121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121889454729 - 2¹ = 121889454727 is a prime.

It is a super-3 number, since 3×121889454729³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121889454727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2902129854 + ... + 2902129895.

It is an arithmetic number, because the mean of its divisors is an integer number (23217039000).

Almost surely, 2^121889454729 is an apocalyptic number.

It is an amenable number.

121889454729 is a deficient number, since it is larger than the sum of its proper divisors (63846857271).

121889454729 is an equidigital number, since it uses as much as digits as its factorization.

121889454729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804259759.

The product of its digits is 11612160, while the sum is 60.

The spelling of 121889454729 in words is "one hundred twenty-one billion, eight hundred eighty-nine million, four hundred fifty-four thousand, seven hundred twenty-nine".