121243331040 has 144 divisors (see below), whose sum is σ = 413554822128. Its totient is φ = 29844492288.

The previous prime is 121243331039. The next prime is 121243331047. The reversal of 121243331040 is 40133342121.

It is a happy number.

121243331040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121243331040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121243331047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666189 + ... + 828428.

It is an arithmetic number, because the mean of its divisors is an integer number (2871908487).

Almost surely, 2^121243331040 is an apocalyptic number.

121243331040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121243331040 is an abundant number, since it is smaller than the sum of its proper divisors (292311491088).

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

121243331040 is a wasteful number, since it uses less digits than its factorization.

121243331040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494661 (or 1494640 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 121243331040 its reverse (40133342121), we get a palindrome (161376673161).

The spelling of 121243331040 in words is "one hundred twenty-one billion, two hundred forty-three million, three hundred thirty-one thousand, forty".