212142001 has 4 divisors (see below), whose sum is σ = 212463604. Its totient is φ = 211820400.

The previous prime is 212141983. The next prime is 212142061. The reversal of 212142001 is 100241212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72335025 + 139806976 = 8505^2 + 11824^2 .

It is a cyclic number.

It is not a de Polignac number, because 212142001 - 2²⁵ = 178587569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212142061) 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 3 ways as a sum of consecutive naturals, for example, 159810 + ... + 161131.

It is an arithmetic number, because the mean of its divisors is an integer number (53115901).

Almost surely, 2^212142001 is an apocalyptic number.

It is an amenable number.

212142001 is a deficient number, since it is larger than the sum of its proper divisors (321603).

212142001 is an equidigital number, since it uses as much as digits as its factorization.

212142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321602.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212142001 is about 14565.0952966330. The cubic root of 212142001 is about 596.4062971774.

Adding to 212142001 its reverse (100241212), we get a palindrome (312383213).

The spelling of 212142001 in words is "two hundred twelve million, one hundred forty-two thousand, one".