20212100211021 has 4 divisors (see below), whose sum is σ = 26949466948032. Its totient is φ = 13474733474012.

The previous prime is 20212100211001. The next prime is 20212100211053. The reversal of 20212100211021 is 12011200121202.

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.

It is a cyclic number.

It is not a de Polignac number, because 20212100211021 - 2⁶ = 20212100210957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212100211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368683368501 + ... + 3368683368506.

It is an arithmetic number, because the mean of its divisors is an integer number (6737366737008).

Almost surely, 2^{20212100211021} is an apocalyptic number.

It is an amenable number.

20212100211021 is a deficient number, since it is larger than the sum of its proper divisors (6737366737011).

20212100211021 is an equidigital number, since it uses as much as digits as its factorization.

20212100211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737366737010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20212100211021 its reverse (12011200121202), we get a palindrome (32223300332223).

The spelling of 20212100211021 in words is "twenty trillion, two hundred twelve billion, one hundred million, two hundred eleven thousand, twenty-one".