1013121040 has 40 divisors (see below), whose sum is σ = 2479484160. Its totient is φ = 383918976.

The previous prime is 1013121019. The next prime is 1013121041. The reversal of 1013121040 is 401213101.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1013121040.

It is not an unprimeable number, because it can be changed into a prime (1013121041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331744 + ... + 334783.

It is an arithmetic number, because the mean of its divisors is an integer number (61987104).

Almost surely, 2^1013121040 is an apocalyptic number.

1013121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013121040 is an abundant number, since it is smaller than the sum of its proper divisors (1466363120).

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

1013121040 is a wasteful number, since it uses less digits than its factorization.

1013121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666559 (or 666553 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1013121040 is about 31829.5623595424. The cubic root of 1013121040 is about 1004.3546891559.

Adding to 1013121040 its reverse (401213101), we get a palindrome (1414334141).

The spelling of 1013121040 in words is "one billion, thirteen million, one hundred twenty-one thousand, forty".