10121440155 has 32 divisors (see below), whose sum is σ = 16349022720. Its totient is φ = 5346739200.

The previous prime is 10121440129. The next prime is 10121440159. The reversal of 10121440155 is 55104412101.

It is not a de Polignac number, because 10121440155 - 2⁵ = 10121440123 is a prime.

It is a super-2 number, since 2×10121440155² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10121440159) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 793216 + ... + 805874.

It is an arithmetic number, because the mean of its divisors is an integer number (510906960).

Almost surely, 2^10121440155 is an apocalyptic number.

10121440155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10121440155 is a deficient number, since it is larger than the sum of its proper divisors (6227582565).

10121440155 is a wasteful number, since it uses less digits than its factorization.

10121440155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13171.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 10121440155 its reverse (55104412101), we get a palindrome (65225852256).

The spelling of 10121440155 in words is "ten billion, one hundred twenty-one million, four hundred forty thousand, one hundred fifty-five".