212021213022 has 24 divisors (see below), whose sum is σ = 459512160120. Its totient is φ = 70653296880.

The previous prime is 212021213021. The next prime is 212021213023. The reversal of 212021213022 is 220312120212.

It is an interprime number because it is at equal distance from previous prime (212021213021) and next prime (212021213023).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212021212986 and 212021213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021213021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1639372 + ... + 1763967.

It is an arithmetic number, because the mean of its divisors is an integer number (19146340005).

Almost surely, 2^212021213022 is an apocalyptic number.

212021213022 is an abundant number, since it is smaller than the sum of its proper divisors (247490947098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021213022 is a wasteful number, since it uses less digits than its factorization.

212021213022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406808 (or 3406805 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212021213022 its reverse (220312120212), we get a palindrome (432333333234).

The spelling of 212021213022 in words is "two hundred twelve billion, twenty-one million, two hundred thirteen thousand, twenty-two".