2021232131 has 4 divisors (see below), whose sum is σ = 2024861472. Its totient is φ = 2017602792.

The previous prime is 2021232127. The next prime is 2021232167. The reversal of 2021232131 is 1312321202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021232131 - 2² = 2021232127 is a prime.

It is a super-2 number, since 2×2021232131² = 8170758654773602322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (2021232431) 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, 1813835 + ... + 1814948.

It is an arithmetic number, because the mean of its divisors is an integer number (506215368).

Almost surely, 2^2021232131 is an apocalyptic number.

2021232131 is a deficient number, since it is larger than the sum of its proper divisors (3629341).

2021232131 is an equidigital number, since it uses as much as digits as its factorization.

2021232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629340.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2021232131 is about 44958.1152963511. The cubic root of 2021232131 is about 1264.3638332923.

Adding to 2021232131 its reverse (1312321202), we get a palindrome (3333553333).

The spelling of 2021232131 in words is "two billion, twenty-one million, two hundred thirty-two thousand, one hundred thirty-one".