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121555379316 = 223723297130557
BaseRepresentation
bin111000100110101000…
…0111110010001110100
3102121202101220001210210
41301031100332101310
53442421134114231
6131501453345420
711532153450660
oct1611520762164
9377671801723
10121555379316
114760792a678
121b684798270
13b6024c9367
145c51b438a0
1532667dda46
hex1c4d43e474

121555379316 has 192 divisors, whose sum is σ = 354844385280. Its totient is φ = 31621793280.

The previous prime is 121555379291. The next prime is 121555379321. The reversal of 121555379316 is 613973555121.

121555379316 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3962710 + ... + 3993266.

It is an arithmetic number, because the mean of its divisors is an integer number (1848147840).

Almost surely, 2121555379316 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 121555379316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177422192640).

121555379316 is an abundant number, since it is smaller than the sum of its proper divisors (233289005964).

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

121555379316 is a wasteful number, since it uses less digits than its factorization.

121555379316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30694 (or 30692 counting only the distinct ones).

The product of its digits is 850500, while the sum is 48.

The spelling of 121555379316 in words is "one hundred twenty-one billion, five hundred fifty-five million, three hundred seventy-nine thousand, three hundred sixteen".