121273320 has 128 divisors (see below), whose sum is σ = 423014400. Its totient is φ = 27238656.

The previous prime is 121273297. The next prime is 121273343. The reversal of 121273320 is 23372121.

It is an interprime number because it is at equal distance from previous prime (121273297) and next prime (121273343).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48337 + ... + 50783.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^121273320 is an apocalyptic number.

121273320 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 121273320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211507200).

121273320 is an abundant number, since it is smaller than the sum of its proper divisors (301741080).

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

121273320 is a wasteful number, since it uses less digits than its factorization.

121273320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527 (or 2523 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 121273320 is about 11012.4166285153. The cubic root of 121273320 is about 494.9808787635.

The spelling of 121273320 in words is "one hundred twenty-one million, two hundred seventy-three thousand, three hundred twenty".