2131212001 has 8 divisors (see below), whose sum is σ = 2205371880. Its totient is φ = 2057096832.

The previous prime is 2131211989. The next prime is 2131212023. The reversal of 2131212001 is 1002121312.

It can be written as a sum of positive squares in 4 ways, for example, as 415181376 + 1716030625 = 20376^2 + 41425^2 .

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 2131212001 - 2¹⁷ = 2131080929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131212901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107221 + ... + 125533.

It is an arithmetic number, because the mean of its divisors is an integer number (275671485).

Almost surely, 2^2131212001 is an apocalyptic number.

It is an amenable number.

2131212001 is a deficient number, since it is larger than the sum of its proper divisors (74159879).

2131212001 is a wasteful number, since it uses less digits than its factorization.

2131212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22355.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2131212001 is about 46165.0517274702. The cubic root of 2131212001 is about 1286.8923454967.

Adding to 2131212001 its reverse (1002121312), we get a palindrome (3133333313).

The spelling of 2131212001 in words is "two billion, one hundred thirty-one million, two hundred twelve thousand, one".