121403444 has 12 divisors (see below), whose sum is σ = 216976704. Its totient is φ = 59410104.

The previous prime is 121403441. The next prime is 121403461. The reversal of 121403444 is 444304121.

It is a happy number.

It is a super-2 number, since 2×121403444² = 29477592430122272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322694 + ... + 323069.

It is an arithmetic number, because the mean of its divisors is an integer number (18081392).

Almost surely, 2^121403444 is an apocalyptic number.

It is an amenable number.

121403444 is a deficient number, since it is larger than the sum of its proper divisors (95573260).

121403444 is a wasteful number, since it uses less digits than its factorization.

121403444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645814 (or 645812 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 121403444 is about 11018.3231029045. The cubic root of 121403444 is about 495.1578505522.

Adding to 121403444 its reverse (444304121), we get a palindrome (565707565).

The spelling of 121403444 in words is "one hundred twenty-one million, four hundred three thousand, four hundred forty-four".