221321011340410 has 16 divisors (see below), whose sum is σ = 399093040926216. Its totient is φ = 88369466644288.

The previous prime is 221321011340339. The next prime is 221321011340437. The reversal of 221321011340410 is 14043110123122.

It can be written as a sum of positive squares in 4 ways, for example, as 196193779872561 + 25127231467849 = 14006919^2 + 5012707^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19867230637 + ... + 19867241776.

Almost surely, 2^{221321011340410} is an apocalyptic number.

221321011340410 is a deficient number, since it is larger than the sum of its proper divisors (177772029585806).

221321011340410 is a wasteful number, since it uses less digits than its factorization.

221321011340410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39734472977.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 221321011340410 its reverse (14043110123122), we get a palindrome (235364121463532).

The spelling of 221321011340410 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, eleven million, three hundred forty thousand, four hundred ten".