204120121011240 has 128 divisors (see below), whose sum is σ = 704031076546560. Its totient is φ = 46376650216704.

The previous prime is 204120121011227. The next prime is 204120121011277. The reversal of 204120121011240 is 42110121021402.

It is a super-2 number, since 2×204120121011240² (a number of 29 digits) contains 22 as substring.

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

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, 727405062 + ... + 727685621.

It is an arithmetic number, because the mean of its divisors is an integer number (5500242785520).

Almost surely, 2^{204120121011240} is an apocalyptic number.

204120121011240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204120121011240 is an abundant number, since it is smaller than the sum of its proper divisors (499910955535320).

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

204120121011240 is a wasteful number, since it uses less digits than its factorization.

204120121011240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455090871 (or 1455090867 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 204120121011240 its reverse (42110121021402), we get a palindrome (246230242032642).

The spelling of 204120121011240 in words is "two hundred four trillion, one hundred twenty billion, one hundred twenty-one million, eleven thousand, two hundred forty".