121343400225 has 72 divisors (see below), whose sum is σ = 220620022272. Its totient is φ = 63741484800.

The previous prime is 121343400203. The next prime is 121343400247. The reversal of 121343400225 is 522004343121.

121343400225 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 434 + 0 + 0 + 225 = 666.

It is an interprime number because it is at equal distance from previous prime (121343400203) and next prime (121343400247).

It is not a de Polignac number, because 121343400225 - 2¹³ = 121343392033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19054992 + ... + 19061358.

It is an arithmetic number, because the mean of its divisors is an integer number (3064166976).

Almost surely, 2^121343400225 is an apocalyptic number.

121343400225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121343400225 is a deficient number, since it is larger than the sum of its proper divisors (99276622047).

121343400225 is a wasteful number, since it uses less digits than its factorization.

121343400225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7647 (or 7639 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 121343400225 its reverse (522004343121), we get a palindrome (643347743346).

The spelling of 121343400225 in words is "one hundred twenty-one billion, three hundred forty-three million, four hundred thousand, two hundred twenty-five".