221220021212222 has 4 divisors (see below), whose sum is σ = 331830031818336. Its totient is φ = 110610010606110.

The previous prime is 221220021212153. The next prime is 221220021212273. The reversal of 221220021212222 is 222212120022122.

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

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, 55305005303054 + ... + 55305005303057.

It is an arithmetic number, because the mean of its divisors is an integer number (82957507954584).

Almost surely, 2^{221220021212222} is an apocalyptic number.

221220021212222 is a deficient number, since it is larger than the sum of its proper divisors (110610010606114).

221220021212222 is a wasteful number, since it uses less digits than its factorization.

221220021212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110610010606113.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221220021212222 its reverse (222212120022122), we get a palindrome (443432141234344).

The spelling of 221220021212222 in words is "two hundred twenty-one trillion, two hundred twenty billion, twenty-one million, two hundred twelve thousand, two hundred twenty-two".