121023440 has 60 divisors (see below), whose sum is σ = 286489476. Its totient is φ = 47545344.

The previous prime is 121023437. The next prime is 121023479. The reversal of 121023440 is 44320121.

It can be written as a sum of positive squares in 2 ways, for example, as 37994896 + 83028544 = 6164^2 + 9112^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 358952 + ... + 359288.

Almost surely, 2^121023440 is an apocalyptic number.

121023440 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 121023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143244738).

121023440 is an abundant number, since it is smaller than the sum of its proper divisors (165466036).

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

121023440 is an equidigital number, since it uses as much as digits as its factorization.

121023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121023440 is about 11001.0654029508. The cubic root of 121023440 is about 494.6406806345.

Adding to 121023440 its reverse (44320121), we get a palindrome (165343561).

The spelling of 121023440 in words is "one hundred twenty-one million, twenty-three thousand, four hundred forty".