121022640 has 160 divisors (see below), whose sum is σ = 426877440. Its totient is φ = 31497984.

The previous prime is 121022623. The next prime is 121022651. The reversal of 121022640 is 46220121.

121022640 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 22 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92229 + ... + 93531.

It is an arithmetic number, because the mean of its divisors is an integer number (2667984).

Almost surely, 2^121022640 is an apocalyptic number.

121022640 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 121022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213438720).

121022640 is an abundant number, since it is smaller than the sum of its proper divisors (305854800).

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

121022640 is a wasteful number, since it uses less digits than its factorization.

121022640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121022640 is about 11001.0290427760. The cubic root of 121022640 is about 494.6395907261.

Adding to 121022640 its reverse (46220121), we get a palindrome (167242761).

The spelling of 121022640 in words is "one hundred twenty-one million, twenty-two thousand, six hundred forty".