121353444 has 48 divisors (see below), whose sum is σ = 315719040. Its totient is φ = 40309920.

The previous prime is 121353443. The next prime is 121353469. The reversal of 121353444 is 444353121.

It is a happy number.

121353444 is a `hidden beast` number, since 1 + 213 + 5 + 3 + 444 = 666.

It is a super-2 number, since 2×121353444² = 29453316741322272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121353443) 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, 31782 + ... + 35394.

It is an arithmetic number, because the mean of its divisors is an integer number (6577480).

Almost surely, 2^121353444 is an apocalyptic number.

It is an amenable number.

121353444 is an abundant number, since it is smaller than the sum of its proper divisors (194365596).

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

121353444 is a wasteful number, since it uses less digits than its factorization.

121353444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937 (or 3929 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 121353444 is about 11016.0539214367. The cubic root of 121353444 is about 495.0898643091.

It can be divided in two parts, 121 and 353444, that multiplied together give a palindrome (42766724).

The spelling of 121353444 in words is "one hundred twenty-one million, three hundred fifty-three thousand, four hundred forty-four".