121322540 has 24 divisors (see below), whose sum is σ = 269764992. Its totient is φ = 45674240.

The previous prime is 121322503. The next prime is 121322549. The reversal of 121322540 is 45223121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (121322549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178076 + ... + 178755.

It is an arithmetic number, because the mean of its divisors is an integer number (11240208).

Almost surely, 2^121322540 is an apocalyptic number.

121322540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121322540 is an abundant number, since it is smaller than the sum of its proper divisors (148442452).

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

121322540 is a wasteful number, since it uses less digits than its factorization.

121322540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356857 (or 356855 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121322540 is about 11014.6511519884. The cubic root of 121322540 is about 495.0478340334.

Adding to 121322540 its reverse (45223121), we get a palindrome (166545661).

The spelling of 121322540 in words is "one hundred twenty-one million, three hundred twenty-two thousand, five hundred forty".