20212120210001 has 4 divisors (see below), whose sum is σ = 20212131685104. Its totient is φ = 20212108734900.

The previous prime is 20212120209989. The next prime is 20212120210031. The reversal of 20212120210001 is 10001202121202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20212120210001 - 2²² = 20212116015697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212120210031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2478335 + ... + 6823956.

It is an arithmetic number, because the mean of its divisors is an integer number (5053032921276).

Almost surely, 2^{20212120210001} is an apocalyptic number.

It is an amenable number.

20212120210001 is a deficient number, since it is larger than the sum of its proper divisors (11475103).

20212120210001 is an equidigital number, since it uses as much as digits as its factorization.

20212120210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11475102.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20212120210001 its reverse (10001202121202), we get a palindrome (30213322331203).

It can be divided in two parts, 202121202 and 10001, that multiplied together give a palindrome (2021414141202).

The spelling of 20212120210001 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, two hundred ten thousand, one".