1000013232121 has 4 divisors (see below), whose sum is σ = 1003730753700. Its totient is φ = 996295710544.

The previous prime is 1000013232091. The next prime is 1000013232133. The reversal of 1000013232121 is 1212323100001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262209540096 + 737803692025 = 512064^2 + 858955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000013232121 - 2⁷ = 1000013231993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000013232095 and 1000013232104.

It is not an unprimeable number, because it can be changed into a prime (1000013232521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1858760386 + ... + 1858760923.

It is an arithmetic number, because the mean of its divisors is an integer number (250932688425).

Almost surely, 2^{1000013232121} is an apocalyptic number.

It is an amenable number.

1000013232121 is a deficient number, since it is larger than the sum of its proper divisors (3717521579).

1000013232121 is an equidigital number, since it uses as much as digits as its factorization.

1000013232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717521578.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1000013232121 its reverse (1212323100001), we get a palindrome (2212336332122).

The spelling of 1000013232121 in words is "one trillion, thirteen million, two hundred thirty-two thousand, one hundred twenty-one".