121400444 has 24 divisors (see below), whose sum is σ = 233200128. Its totient is φ = 54840240.

The previous prime is 121400437. The next prime is 121400459. The reversal of 121400444 is 444004121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1292 + ... + 15635.

It is an arithmetic number, because the mean of its divisors is an integer number (9716672).

Almost surely, 2^121400444 is an apocalyptic number.

It is an amenable number.

121400444 is a deficient number, since it is larger than the sum of its proper divisors (111799684).

121400444 is a wasteful number, since it uses less digits than its factorization.

121400444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17105 (or 17103 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 121400444 is about 11018.1869651953. The cubic root of 121400444 is about 495.1537719040.

Adding to 121400444 its reverse (444004121), we get a palindrome (565404565).

The spelling of 121400444 in words is "one hundred twenty-one million, four hundred thousand, four hundred forty-four".