221001012212222 has 96 divisors (see below), whose sum is σ = 374732991142272. Its totient is φ = 97619613696000.

The previous prime is 221001012212209. The next prime is 221001012212261. The reversal of 221001012212222 is 222212210100122.

It is a junction number, because it is equal to n+sod(n) for n = 221001012212194 and 221001012212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15748657718 + ... + 15748671750.

It is an arithmetic number, because the mean of its divisors is an integer number (3903468657732).

Almost surely, 2^{221001012212222} is an apocalyptic number.

221001012212222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221001012212222 is a deficient number, since it is larger than the sum of its proper divisors (153731978930050).

221001012212222 is a wasteful number, since it uses less digits than its factorization.

221001012212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20226 (or 20215 counting only the distinct ones).

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

Adding to 221001012212222 its reverse (222212210100122), we get a palindrome (443213222312344).

The spelling of 221001012212222 in words is "two hundred twenty-one trillion, one billion, twelve million, two hundred twelve thousand, two hundred twenty-two".