121444420 has 48 divisors (see below), whose sum is σ = 262180800. Its totient is φ = 47235200.

The previous prime is 121444417. The next prime is 121444423. The reversal of 121444420 is 24444121.

It is an interprime number because it is at equal distance from previous prime (121444417) and next prime (121444423).

It is a junction number, because it is equal to n+sod(n) for n = 121444391 and 121444400.

It is not an unprimeable number, because it can be changed into a prime (121444423) 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, 118671 + ... + 119689.

It is an arithmetic number, because the mean of its divisors is an integer number (5462100).

Almost surely, 2^121444420 is an apocalyptic number.

121444420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121444420 is an abundant number, since it is smaller than the sum of its proper divisors (140736380).

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

121444420 is a wasteful number, since it uses less digits than its factorization.

121444420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 121444420 is about 11020.1823941349. The cubic root of 121444420 is about 495.2135527221.

Adding to 121444420 its reverse (24444121), we get a palindrome (145888541).

The spelling of 121444420 in words is "one hundred twenty-one million, four hundred forty-four thousand, four hundred twenty".