121554240410 has 16 divisors (see below), whose sum is σ = 218801794536. Its totient is φ = 48620771328.

The previous prime is 121554240407. The next prime is 121554240439. The reversal of 121554240410 is 14042455121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88594927201 + 32959313209 = 297649^2 + 181547^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 733142 + ... + 883518.

Almost surely, 2^121554240410 is an apocalyptic number.

121554240410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121554240410 is a deficient number, since it is larger than the sum of its proper divisors (97247554126).

121554240410 is a wasteful number, since it uses less digits than its factorization.

121554240410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231217.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 121554240410 its reverse (14042455121), we get a palindrome (135596695531).

The spelling of 121554240410 in words is "one hundred twenty-one billion, five hundred fifty-four million, two hundred forty thousand, four hundred ten".