1000120021013 has 4 divisors (see below), whose sum is σ = 1001784114828. Its totient is φ = 998455927200.

The previous prime is 1000120020997. The next prime is 1000120021049. The reversal of 1000120021013 is 3101200210001.

1000120021013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 817228656049 + 182891364964 = 904007^2 + 427658^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000120021013 - 2⁴ = 1000120020997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000120020985 and 1000120021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000120021513) 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, 832046006 + ... + 832047207.

It is an arithmetic number, because the mean of its divisors is an integer number (250446028707).

Almost surely, 2^{1000120021013} is an apocalyptic number.

It is an amenable number.

1000120021013 is a deficient number, since it is larger than the sum of its proper divisors (1664093815).

1000120021013 is an equidigital number, since it uses as much as digits as its factorization.

1000120021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664093814.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1000120021013 its reverse (3101200210001), we get a palindrome (4101320231014).

The spelling of 1000120021013 in words is "one trillion, one hundred twenty million, twenty-one thousand, thirteen".