212020231 has 4 divisors (see below), whose sum is σ = 212524264. Its totient is φ = 211516200.

The previous prime is 212020223. The next prime is 212020261. The reversal of 212020231 is 132020212.

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 212020231 - 2³ = 212020223 is a prime.

It is a super-2 number, since 2×212020231² = 89905156706586722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020261) 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, 251385 + ... + 252226.

It is an arithmetic number, because the mean of its divisors is an integer number (53131066).

Almost surely, 2^212020231 is an apocalyptic number.

212020231 is a deficient number, since it is larger than the sum of its proper divisors (504033).

212020231 is an equidigital number, since it uses as much as digits as its factorization.

212020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504032.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212020231 is about 14560.9144973796. The cubic root of 212020231 is about 596.2921624714.

Adding to 212020231 its reverse (132020212), we get a palindrome (344040443).

The spelling of 212020231 in words is "two hundred twelve million, twenty thousand, two hundred thirty-one".