2021401121 has 4 divisors (see below), whose sum is σ = 2021793072. Its totient is φ = 2021009172.

The previous prime is 2021401111. The next prime is 2021401157. The reversal of 2021401121 is 1211041202.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2021401121 - 2²² = 2017206817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021401096 and 2021401105.

It is not an unprimeable number, because it can be changed into a prime (2021401111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188135 + ... + 198588.

It is an arithmetic number, because the mean of its divisors is an integer number (505448268).

Almost surely, 2^2021401121 is an apocalyptic number.

It is an amenable number.

2021401121 is a deficient number, since it is larger than the sum of its proper divisors (391951).

2021401121 is an equidigital number, since it uses as much as digits as its factorization.

2021401121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391950.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2021401121 is about 44959.9946730424. The cubic root of 2021401121 is about 1264.3990690422.

Adding to 2021401121 its reverse (1211041202), we get a palindrome (3232442323).

The spelling of 2021401121 in words is "two billion, twenty-one million, four hundred one thousand, one hundred twenty-one".