121144420 has 12 divisors (see below), whose sum is σ = 254403324. Its totient is φ = 48457760.

The previous prime is 121144417. The next prime is 121144421. The reversal of 121144420 is 24441121.

It can be written as a sum of positive squares in 2 ways, for example, as 49674304 + 71470116 = 7048^2 + 8454^2 .

It is a super-3 number, since 3×121144420³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121144421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028591 + ... + 3028630.

It is an arithmetic number, because the mean of its divisors is an integer number (21200277).

Almost surely, 2^121144420 is an apocalyptic number.

121144420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121144420 is an abundant number, since it is smaller than the sum of its proper divisors (133258904).

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

121144420 is a wasteful number, since it uses less digits than its factorization.

121144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057230 (or 6057228 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 121144420 is about 11006.5625878382. The cubic root of 121144420 is about 494.8054467894.

Adding to 121144420 its reverse (24441121), we get a palindrome (145585541).

The spelling of 121144420 in words is "one hundred twenty-one million, one hundred forty-four thousand, four hundred twenty".