121213344 has 96 divisors (see below), whose sum is σ = 369726336. Its totient is φ = 34053120.

The previous prime is 121213333. The next prime is 121213397. The reversal of 121213344 is 443312121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 121213344.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39514 + ... + 42470.

It is an arithmetic number, because the mean of its divisors is an integer number (3851316).

Almost surely, 2^121213344 is an apocalyptic number.

121213344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121213344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184863168).

121213344 is an abundant number, since it is smaller than the sum of its proper divisors (248512992).

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

121213344 is a wasteful number, since it uses less digits than its factorization.

121213344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038 (or 3030 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 121213344 is about 11009.6931837359. The cubic root of 121213344 is about 494.8992673300.

Adding to 121213344 its reverse (443312121), we get a palindrome (564525465).

The spelling of 121213344 in words is "one hundred twenty-one million, two hundred thirteen thousand, three hundred forty-four".