121024004240 has 40 divisors (see below), whose sum is σ = 285343933248. Its totient is φ = 47727774080.

The previous prime is 121024004159. The next prime is 121024004249. The reversal of 121024004240 is 42400420121.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is not an unprimeable number, because it can be changed into a prime (121024004249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10647842 + ... + 10659201.

Almost surely, 2^121024004240 is an apocalyptic number.

121024004240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121024004240 is an abundant number, since it is smaller than the sum of its proper divisors (164319929008).

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

121024004240 is a wasteful number, since it uses less digits than its factorization.

121024004240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21307127 (or 21307121 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 121024004240 its reverse (42400420121), we get a palindrome (163424424361).

The spelling of 121024004240 in words is "one hundred twenty-one billion, twenty-four million, four thousand, two hundred forty".