212021022021 has 32 divisors (see below), whose sum is σ = 298766361600. Its totient is φ = 133372229760.

The previous prime is 212021022001. The next prime is 212021022023. The reversal of 212021022021 is 120220120212.

It is not a de Polignac number, because 212021022021 - 2¹³ = 212021013829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021022023) 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, 15445441 + ... + 15459161.

It is an arithmetic number, because the mean of its divisors is an integer number (9336448800).

Almost surely, 2^212021022021 is an apocalyptic number.

It is an amenable number.

212021022021 is a deficient number, since it is larger than the sum of its proper divisors (86745339579).

212021022021 is a wasteful number, since it uses less digits than its factorization.

212021022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14809.

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

Adding to 212021022021 its reverse (120220120212), we get a palindrome (332241142233).

The spelling of 212021022021 in words is "two hundred twelve billion, twenty-one million, twenty-two thousand, twenty-one".