221120021121122 has 4 divisors (see below), whose sum is σ = 331680031681686. Its totient is φ = 110560010560560.

The previous prime is 221120021121119. The next prime is 221120021121143. The reversal of 221120021121122 is 221121120021122.

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

It can be written as a sum of positive squares in only one way, i.e., 168542164499641 + 52577856621481 = 12982379^2 + 7251059^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221120021121094 and 221120021121103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280005280279 + ... + 55280005280282.

Almost surely, 2^{221120021121122} is an apocalyptic number.

221120021121122 is a deficient number, since it is larger than the sum of its proper divisors (110560010560564).

221120021121122 is a wasteful number, since it uses less digits than its factorization.

221120021121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110560010560563.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221120021121122 its reverse (221121120021122), we get a palindrome (442241141142244).

The spelling of 221120021121122 in words is "two hundred twenty-one trillion, one hundred twenty billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".