212001231 has 16 divisors (see below), whose sum is σ = 312641504. Its totient is φ = 126935424.

The previous prime is 212001149. The next prime is 212001233. The reversal of 212001231 is 132100212.

It is not a de Polignac number, because 212001231 - 2²⁶ = 144892367 is a prime.

It is a super-2 number, since 2×212001231² = 89889043891030722, 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 (212001233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72016 + ... + 74901.

It is an arithmetic number, because the mean of its divisors is an integer number (19540094).

Almost surely, 2^212001231 is an apocalyptic number.

212001231 is a deficient number, since it is larger than the sum of its proper divisors (100640273).

212001231 is a wasteful number, since it uses less digits than its factorization.

212001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146970.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 212001231 is about 14560.2620512132. The cubic root of 212001231 is about 596.2743498795.

Adding to 212001231 its reverse (132100212), we get a palindrome (344101443).

The spelling of 212001231 in words is "two hundred twelve million, one thousand, two hundred thirty-one".