212020111021 has 4 divisors (see below), whose sum is σ = 212022376992. Its totient is φ = 212017845052.

The previous prime is 212020111007. The next prime is 212020111081. The reversal of 212020111021 is 120111020212.

212020111021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212020111021 - 2²¹ = 212018013869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020110992 and 212020111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020111081) 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 3 ways as a sum of consecutive naturals, for example, 986305 + ... + 1181878.

It is an arithmetic number, because the mean of its divisors is an integer number (53005594248).

Almost surely, 2^212020111021 is an apocalyptic number.

It is an amenable number.

212020111021 is a deficient number, since it is larger than the sum of its proper divisors (2265971).

212020111021 is an equidigital number, since it uses as much as digits as its factorization.

212020111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265970.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212020111021 its reverse (120111020212), we get a palindrome (332131131233).

The spelling of 212020111021 in words is "two hundred twelve billion, twenty million, one hundred eleven thousand, twenty-one".