212222010021 has 48 divisors (see below), whose sum is σ = 343873087488. Its totient is φ = 115943637600.

The previous prime is 212222010019. The next prime is 212222010031. The reversal of 212222010021 is 120010222212.

212222010021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212222010021 - 2¹ = 212222010019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222010001) 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 47 ways as a sum of consecutive naturals, for example, 97686 + ... + 658776.

It is an arithmetic number, because the mean of its divisors is an integer number (7164022656).

Almost surely, 2^212222010021 is an apocalyptic number.

212222010021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212222010021 is a deficient number, since it is larger than the sum of its proper divisors (131651077467).

212222010021 is a wasteful number, since it uses less digits than its factorization.

212222010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561222 (or 561215 counting only the distinct ones).

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

Adding to 212222010021 its reverse (120010222212), we get a palindrome (332232232233).

The spelling of 212222010021 in words is "two hundred twelve billion, two hundred twenty-two million, ten thousand, twenty-one".