2021000121 has 24 divisors (see below), whose sum is σ = 3346189184. Its totient is φ = 1151418240.

The previous prime is 2021000119. The next prime is 2021000123. The reversal of 2021000121 is 1210001202.

2021000121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2021000119) and next prime (2021000123).

It is not a de Polignac number, because 2021000121 - 2¹ = 2021000119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021000123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26365 + ... + 68826.

Almost surely, 2^2021000121 is an apocalyptic number.

2021000121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2021000121 is a deficient number, since it is larger than the sum of its proper divisors (1325189063).

2021000121 is a wasteful number, since it uses less digits than its factorization.

2021000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95541 (or 95538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2021000121 is about 44955.5349317523. The cubic root of 2021000121 is about 1264.3154541752.

Adding to 2021000121 its reverse (1210001202), we get a palindrome (3231001323).

The spelling of 2021000121 in words is "two billion, twenty-one million, one hundred twenty-one", and thus it is an aban number.