121043003240 has 64 divisors (see below), whose sum is σ = 279824222160. Its totient is φ = 47088967680.

The previous prime is 121043003177. The next prime is 121043003281. The reversal of 121043003240 is 42300340121.

It can be written as a sum of positive squares in 8 ways, for example, as 42874671844 + 78168331396 = 207062^2 + 279586^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 3821870 + ... + 3853410.

Almost surely, 2^121043003240 is an apocalyptic number.

121043003240 is a gapful number since it is divisible by the number (10) 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 121043003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139912111080).

121043003240 is an abundant number, since it is smaller than the sum of its proper divisors (158781218920).

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

121043003240 is a wasteful number, since it uses less digits than its factorization.

121043003240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34182 (or 34178 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121043003240 its reverse (42300340121), we get a palindrome (163343343361).

The spelling of 121043003240 in words is "one hundred twenty-one billion, forty-three million, three thousand, two hundred forty".