121204204240 has 160 divisors (see below), whose sum is σ = 332716990464. Its totient is φ = 40182428160.

The previous prime is 121204204183. The next prime is 121204204307. The reversal of 121204204240 is 42402402121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31020367 + ... + 31024273.

Almost surely, 2^121204204240 is an apocalyptic number.

121204204240 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 121204204240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166358495232).

121204204240 is an abundant number, since it is smaller than the sum of its proper divisors (211512786224).

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

121204204240 is a wasteful number, since it uses less digits than its factorization.

121204204240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5745 (or 5739 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 121204204240 its reverse (42402402121), we get a palindrome (163606606361).

The spelling of 121204204240 in words is "one hundred twenty-one billion, two hundred four million, two hundred four thousand, two hundred forty".