121180265280 has 168 divisors, whose sum is σ = 417614810184. Its totient is φ = 32252313600.

The previous prime is 121180265267. The next prime is 121180265293. The reversal of 121180265280 is 82562081121.

121180265280 is a `hidden beast` number, since 1 + 2 + 118 + 0 + 265 + 280 = 666.

It is an interprime number because it is at equal distance from previous prime (121180265267) and next prime (121180265293).

It can be written as a sum of positive squares in 4 ways, for example, as 643535424 + 120536729856 = 25368^2 + 347184^2 .

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

It is a congruent number.

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, 1460100 + ... + 1540860.

Almost surely, 2^121180265280 is an apocalyptic number.

121180265280 is a gapful number since it is divisible by the number (10) 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 121180265280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208807405092).

121180265280 is an abundant number, since it is smaller than the sum of its proper divisors (296434544904).

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

121180265280 is a wasteful number, since it uses less digits than its factorization.

121180265280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81305 (or 81292 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 121180265280 in words is "one hundred twenty-one billion, one hundred eighty million, two hundred sixty-five thousand, two hundred eighty".