121567922280 has 768 divisors, whose sum is σ = 495896256000. Its totient is φ = 25918341120.

The previous prime is 121567922221. The next prime is 121567922303. The reversal of 121567922280 is 82229765121.

121567922280 is a `hidden beast` number, since 1 + 2 + 1 + 567 + 9 + 2 + 2 + 2 + 80 = 666.

It is a super-2 number, since 2×121567922280² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 210689352 + ... + 210689928.

It is an arithmetic number, because the mean of its divisors is an integer number (645698250).

Almost surely, 2^121567922280 is an apocalyptic number.

121567922280 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 121567922280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247948128000).

121567922280 is an abundant number, since it is smaller than the sum of its proper divisors (374328333720).

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

121567922280 is a wasteful number, since it uses less digits than its factorization.

121567922280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 121567922280 in words is "one hundred twenty-one billion, five hundred sixty-seven million, nine hundred twenty-two thousand, two hundred eighty".