212012202021 has 16 divisors (see below), whose sum is σ = 304488775680. Its totient is φ = 130835018160.

The previous prime is 212012201923. The next prime is 212012202041. The reversal of 212012202021 is 120202210212.

212012202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-212012202021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012202041) 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 15 ways as a sum of consecutive naturals, for example, 49556581 + ... + 49560858.

It is an arithmetic number, because the mean of its divisors is an integer number (19030548480).

Almost surely, 2^212012202021 is an apocalyptic number.

It is an amenable number.

212012202021 is a deficient number, since it is larger than the sum of its proper divisors (92476573659).

212012202021 is a wasteful number, since it uses less digits than its factorization.

212012202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99117496.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212012202021 its reverse (120202210212), we get a palindrome (332214412233).

It can be divided in two parts, 21201 and 2202021, that added together give a palindrome (2223222).

The spelling of 212012202021 in words is "two hundred twelve billion, twelve million, two hundred two thousand, twenty-one".