221012221021222 has 4 divisors (see below), whose sum is σ = 331518331531836. Its totient is φ = 110506110510610.

The previous prime is 221012221021219. The next prime is 221012221021243. The reversal of 221012221021222 is 222120122210122.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 221012221021193 and 221012221021202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55253055255304 + ... + 55253055255307.

It is an arithmetic number, because the mean of its divisors is an integer number (82879582882959).

Almost surely, 2^{221012221021222} is an apocalyptic number.

221012221021222 is a deficient number, since it is larger than the sum of its proper divisors (110506110510614).

221012221021222 is a wasteful number, since it uses less digits than its factorization.

221012221021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110506110510613.

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

Adding to 221012221021222 its reverse (222120122210122), we get a palindrome (443132343231344).

The spelling of 221012221021222 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-two".