121162240 has 160 divisors (see below), whose sum is σ = 318193920. Its totient is φ = 44089344.

The previous prime is 121162231. The next prime is 121162241. The reversal of 121162240 is 42261121.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (121162241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286054 + ... + 2286106.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^121162240 is an apocalyptic number.

121162240 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 121162240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159096960).

121162240 is an abundant number, since it is smaller than the sum of its proper divisors (197031680).

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

121162240 is an equidigital number, since it uses as much as digits as its factorization.

121162240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121162240 is about 11007.3720751140. The cubic root of 121162240 is about 494.8297070917.

The spelling of 121162240 in words is "one hundred twenty-one million, one hundred sixty-two thousand, two hundred forty".