121040012355 has 8 divisors (see below), whose sum is σ = 193664019792. Its totient is φ = 64554673248.

The previous prime is 121040012329. The next prime is 121040012389. The reversal of 121040012355 is 553210040121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121040012355 - 2⁵ = 121040012323 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4034667064 + ... + 4034667093.

It is an arithmetic number, because the mean of its divisors is an integer number (24208002474).

Almost surely, 2^121040012355 is an apocalyptic number.

121040012355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121040012355 is a deficient number, since it is larger than the sum of its proper divisors (72624007437).

121040012355 is an equidigital number, since it uses as much as digits as its factorization.

121040012355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069334165.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 121040012355 its reverse (553210040121), we get a palindrome (674250052476).

The spelling of 121040012355 in words is "one hundred twenty-one billion, forty million, twelve thousand, three hundred fifty-five".