10121012440 has 64 divisors (see below), whose sum is σ = 28391420160. Its totient is φ = 3154600320.

The previous prime is 10121012417. The next prime is 10121012479. The reversal of 10121012440 is 4421012101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639942 + ... + 1646101.

It is an arithmetic number, because the mean of its divisors is an integer number (443615940).

Almost surely, 2^10121012440 is an apocalyptic number.

10121012440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121012440 is an abundant number, since it is smaller than the sum of its proper divisors (18270407720).

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

10121012440 is a wasteful number, since it uses less digits than its factorization.

10121012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286072 (or 3286068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10121012440 its reverse (4421012101), we get a palindrome (14542024541).

The spelling of 10121012440 in words is "ten billion, one hundred twenty-one million, twelve thousand, four hundred forty".