221223122202122 has 4 divisors (see below), whose sum is σ = 331834683303186. Its totient is φ = 110611561101060.

The previous prime is 221223122202107. The next prime is 221223122202197. The reversal of 221223122202122 is 221202221322122.

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., 216465571647361 + 4757550554761 = 14712769^2 + 2181181^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221223122202091 and 221223122202100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55305780550529 + ... + 55305780550532.

Almost surely, 2^{221223122202122} is an apocalyptic number.

221223122202122 is a deficient number, since it is larger than the sum of its proper divisors (110611561101064).

221223122202122 is a wasteful number, since it uses less digits than its factorization.

221223122202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110611561101063.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 221223122202122 its reverse (221202221322122), we get a palindrome (442425343524244).

The spelling of 221223122202122 in words is "two hundred twenty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, two hundred two thousand, one hundred twenty-two".