2021312141 has 4 divisors (see below), whose sum is σ = 2021425632. Its totient is φ = 2021198652.

The previous prime is 2021312107. The next prime is 2021312149. The reversal of 2021312141 is 1412131202.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1412131202 = 2 ⋅706065601.

It is a cyclic number.

It is not a de Polignac number, because 2021312141 - 2⁶ = 2021312077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021312149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23561 + ... + 67806.

It is an arithmetic number, because the mean of its divisors is an integer number (505356408).

Almost surely, 2^2021312141 is an apocalyptic number.

It is an amenable number.

2021312141 is a deficient number, since it is larger than the sum of its proper divisors (113491).

2021312141 is an equidigital number, since it uses as much as digits as its factorization.

2021312141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113490.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2021312141 is about 44959.0051157719. The cubic root of 2021312141 is about 1264.3805162541.

Adding to 2021312141 its reverse (1412131202), we get a palindrome (3433443343).

The spelling of 2021312141 in words is "two billion, twenty-one million, three hundred twelve thousand, one hundred forty-one".