121140430400 has 84 divisors (see below), whose sum is σ = 325179507120. Its totient is φ = 44051059200.

The previous prime is 121140430387. The next prime is 121140430421. The reversal of 121140430400 is 4034041121.

It is a super-3 number, since 3×121140430400³ (a number of 34 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 3423890 + ... + 3459089.

Almost surely, 2^121140430400 is an apocalyptic number.

121140430400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121140430400 is an abundant number, since it is smaller than the sum of its proper divisors (204039076720).

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

121140430400 is a wasteful number, since it uses less digits than its factorization.

121140430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6883012 (or 6882997 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121140430400 its reverse (4034041121), we get a palindrome (125174471521).

The spelling of 121140430400 in words is "one hundred twenty-one billion, one hundred forty million, four hundred thirty thousand, four hundred".