220121222021212 has 12 divisors (see below), whose sum is σ = 385235597158776. Its totient is φ = 110053908547280.

The previous prime is 220121222021201. The next prime is 220121222021387. The reversal of 220121222021212 is 212120222121022.

It is a super-2 number, since 2×220121222021212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675541938 + ... + 1675673305.

It is an arithmetic number, because the mean of its divisors is an integer number (32102966429898).

Almost surely, 2^{220121222021212} is an apocalyptic number.

It is an amenable number.

220121222021212 is a deficient number, since it is larger than the sum of its proper divisors (165114375137564).

220121222021212 is a wasteful number, since it uses less digits than its factorization.

220121222021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351231668 (or 3351231666 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 220121222021212 its reverse (212120222121022), we get a palindrome (432241444142234).

The spelling of 220121222021212 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred twelve".