212122022021 has 32 divisors (see below), whose sum is σ = 264562841088. Its totient is φ = 165601324800.

The previous prime is 212122021967. The next prime is 212122022027. The reversal of 212122022021 is 120220221212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212122022021 - 2¹⁴ = 212122005637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122022027) 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 31 ways as a sum of consecutive naturals, for example, 2555471 + ... + 2637171.

It is an arithmetic number, because the mean of its divisors is an integer number (8267588784).

Almost surely, 2^212122022021 is an apocalyptic number.

It is an amenable number.

212122022021 is a deficient number, since it is larger than the sum of its proper divisors (52440819067).

212122022021 is a wasteful number, since it uses less digits than its factorization.

212122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82101.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212122022021 its reverse (120220221212), we get a palindrome (332342243233).

The spelling of 212122022021 in words is "two hundred twelve billion, one hundred twenty-two million, twenty-two thousand, twenty-one".