212001123 has 8 divisors (see below), whose sum is σ = 282744000. Its totient is φ = 141296168.

The previous prime is 212001109. The next prime is 212001149. The reversal of 212001123 is 321100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212001123 - 2⁶ = 212001059 is a prime.

It is a super-2 number, since 2×212001123² = 89888952306522258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212001099 and 212001108.

It is not an unprimeable number, because it can be changed into a prime (212001523) 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 7 ways as a sum of consecutive naturals, for example, 8368 + ... + 22226.

It is an arithmetic number, because the mean of its divisors is an integer number (35343000).

Almost surely, 2^212001123 is an apocalyptic number.

212001123 is a deficient number, since it is larger than the sum of its proper divisors (70742877).

212001123 is a wasteful number, since it uses less digits than its factorization.

212001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18961.

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

The square root of 212001123 is about 14560.2583424883. The cubic root of 212001123 is about 596.2742486260.

Adding to 212001123 its reverse (321100212), we get a palindrome (533101335).

The spelling of 212001123 in words is "two hundred twelve million, one thousand, one hundred twenty-three".