221012122222012 has 48 divisors (see below), whose sum is σ = 436538201188320. Its totient is φ = 96983342265600.

The previous prime is 221012122221971. The next prime is 221012122222019. The reversal of 221012122222012 is 210222221210122.

It is a super-4 number, since 4×221012122222012⁴ (a number of 58 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012122222019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1375539 + ... + 21069322.

It is an arithmetic number, because the mean of its divisors is an integer number (9094545858090).

Almost surely, 2^{221012122222012} is an apocalyptic number.

221012122222012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221012122222012 is a deficient number, since it is larger than the sum of its proper divisors (215526078966308).

221012122222012 is a wasteful number, since it uses less digits than its factorization.

221012122222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22452622 (or 22452620 counting only the distinct ones).

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

Adding to 221012122222012 its reverse (210222221210122), we get a palindrome (431234343432134).

The spelling of 221012122222012 in words is "two hundred twenty-one trillion, twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, twelve".