1000010002121 has 4 divisors (see below), whose sum is σ = 1076933848452. Its totient is φ = 923086155792.

The previous prime is 1000010002111. The next prime is 1000010002133. The reversal of 1000010002121 is 1212000100001.

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 159331898896 + 840678103225 = 399164^2 + 916885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000010002121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000010002099 and 1000010002108.

It is not an unprimeable number, because it can be changed into a prime (1000010002111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38461923146 + ... + 38461923171.

It is an arithmetic number, because the mean of its divisors is an integer number (269233462113).

Almost surely, 2^{1000010002121} is an apocalyptic number.

It is an amenable number.

1000010002121 is a deficient number, since it is larger than the sum of its proper divisors (76923846331).

1000010002121 is an equidigital number, since it uses as much as digits as its factorization.

1000010002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76923846330.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1000010002121 its reverse (1212000100001), we get a palindrome (2212010102122).

The spelling of 1000010002121 in words is "one trillion, ten million, two thousand, one hundred twenty-one".