221021020212212 has 24 divisors (see below), whose sum is σ = 440294838685632. Its totient is φ = 96096095744000.

The previous prime is 221021020212127. The next prime is 221021020212221. The reversal of 221021020212212 is 212212020120122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109200107789 + ... + 109200109812.

It is an arithmetic number, because the mean of its divisors is an integer number (18345618278568).

Almost surely, 2^{221021020212212} is an apocalyptic number.

221021020212212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221021020212212 is a deficient number, since it is larger than the sum of its proper divisors (219273818473420).

221021020212212 is a wasteful number, since it uses less digits than its factorization.

221021020212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218400217639 (or 218400217637 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221021020212212 its reverse (212212020120122), we get a palindrome (433233040332334).

It can be divided in two parts, 2210210 and 20212212, that added together give a palindrome (22422422).

The spelling of 221021020212212 in words is "two hundred twenty-one trillion, twenty-one billion, twenty million, two hundred twelve thousand, two hundred twelve".