20211212001 has 8 divisors (see below), whose sum is σ = 27676614784. Its totient is φ = 13109975280.

The previous prime is 20211211997. The next prime is 20211212003. The reversal of 20211212001 is 10021211202.

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

It is not a de Polignac number, because 20211212001 - 2² = 20211211997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211212003) 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, 91041385 + ... + 91041606.

It is an arithmetic number, because the mean of its divisors is an integer number (3459576848).

Almost surely, 2^20211212001 is an apocalyptic number.

It is an amenable number.

20211212001 is a deficient number, since it is larger than the sum of its proper divisors (7465402783).

20211212001 is a wasteful number, since it uses less digits than its factorization.

20211212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182083031.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211212001 its reverse (10021211202), we get a palindrome (30232423203).

The spelling of 20211212001 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, one".