121030240400 has 30 divisors (see below), whose sum is σ = 290775153522. Its totient is φ = 48412096000.

The previous prime is 121030240381. The next prime is 121030240417. The reversal of 121030240400 is 4042030121.

It can be written as a sum of positive squares in 3 ways, for example, as 2151475456 + 118878764944 = 46384^2 + 344788^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151287401 + ... + 151288200.

Almost surely, 2^121030240400 is an apocalyptic number.

121030240400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121030240400 is an abundant number, since it is smaller than the sum of its proper divisors (169744913122).

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

121030240400 is a wasteful number, since it uses less digits than its factorization.

121030240400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302575619 (or 302575608 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 121030240400 its reverse (4042030121), we get a palindrome (125072270521).

The spelling of 121030240400 in words is "one hundred twenty-one billion, thirty million, two hundred forty thousand, four hundred".