212121212221022 has 32 divisors (see below), whose sum is σ = 357646496316480. Its totient is φ = 93621649524480.

The previous prime is 212121212221003. The next prime is 212121212221117. The reversal of 212121212221022 is 220122212121212.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42791429 + ... + 47490512.

It is an arithmetic number, because the mean of its divisors is an integer number (11176453009890).

Almost surely, 2^{212121212221022} is an apocalyptic number.

212121212221022 is a deficient number, since it is larger than the sum of its proper divisors (145525284095458).

212121212221022 is a wasteful number, since it uses less digits than its factorization.

212121212221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90285908.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 212121212221022 its reverse (220122212121212), we get a palindrome (432243424342234).

The spelling of 212121212221022 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, twenty-two".