2021012000121 has 4 divisors (see below), whose sum is σ = 2694682666832. Its totient is φ = 1347341333412.

The previous prime is 2021012000071. The next prime is 2021012000153. The reversal of 2021012000121 is 1210002101202.

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 2021012000121 - 2¹¹ = 2021011998073 is a prime.

It is a super-3 number, since 3×2021012000121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021012000097 and 2021012000106.

It is not an unprimeable number, because it can be changed into a prime (2021012000191) 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, 336835333351 + ... + 336835333356.

It is an arithmetic number, because the mean of its divisors is an integer number (673670666708).

Almost surely, 2^{2021012000121} is an apocalyptic number.

It is an amenable number.

2021012000121 is a deficient number, since it is larger than the sum of its proper divisors (673670666711).

2021012000121 is an equidigital number, since it uses as much as digits as its factorization.

2021012000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673670666710.

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

Adding to 2021012000121 its reverse (1210002101202), we get a palindrome (3231014101323).

The spelling of 2021012000121 in words is "two trillion, twenty-one billion, twelve million, one hundred twenty-one", and thus it is an aban number.