221321202123122 has 16 divisors (see below), whose sum is σ = 335673177499800. Its totient is φ = 109432786262400.

The previous prime is 221321202123103. The next prime is 221321202123127.

221321202123122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 200638981054681 + 20682221068441 = 14164709^2 + 4547771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221321202123091 and 221321202123100.

It is not an unprimeable number, because it can be changed into a prime (221321202123127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660658547 + ... + 660993462.

Almost surely, 2^{221321202123122} is an apocalyptic number.

221321202123122 is a deficient number, since it is larger than the sum of its proper divisors (114351975376678).

221321202123122 is a wasteful number, since it uses less digits than its factorization.

221321202123122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321652941.

The product of its (nonzero) digits is 2304, while the sum is 26.

It can be divided in two parts, 22132120 and 2123122, that added together give a palindrome (24255242).

The spelling of 221321202123122 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, two hundred two million, one hundred twenty-three thousand, one hundred twenty-two".