121551117016 has 64 divisors (see below), whose sum is σ = 266039712000. Its totient is φ = 50986454400.

The previous prime is 121551117011. The next prime is 121551117089. The reversal of 121551117016 is 610711155121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121551117011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676291 + ... + 836941.

It is an arithmetic number, because the mean of its divisors is an integer number (4156870500).

Almost surely, 2^121551117016 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 121551117016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133019856000).

121551117016 is an abundant number, since it is smaller than the sum of its proper divisors (144488594984).

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

121551117016 is a wasteful number, since it uses less digits than its factorization.

121551117016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160952 (or 160948 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 31.

The spelling of 121551117016 in words is "one hundred twenty-one billion, five hundred fifty-one million, one hundred seventeen thousand, sixteen".