1000121202021 has 4 divisors (see below), whose sum is σ = 1333494936032. Its totient is φ = 666747468012.

The previous prime is 1000121202011. The next prime is 1000121202037. The reversal of 1000121202021 is 1202021210001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1000121202021 - 2¹⁰ = 1000121200997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121201988 and 1000121202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121202011) 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, 166686867001 + ... + 166686867006.

It is an arithmetic number, because the mean of its divisors is an integer number (333373734008).

Almost surely, 2^{1000121202021} is an apocalyptic number.

It is an amenable number.

1000121202021 is a deficient number, since it is larger than the sum of its proper divisors (333373734011).

1000121202021 is an equidigital number, since it uses as much as digits as its factorization.

1000121202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333373734010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1000121202021 its reverse (1202021210001), we get a palindrome (2202142412022).

The spelling of 1000121202021 in words is "one trillion, one hundred twenty-one million, two hundred two thousand, twenty-one".