221221201301 has 4 divisors (see below), whose sum is σ = 222705907500. Its totient is φ = 219736495104.

The previous prime is 221221201241. The next prime is 221221201339. The reversal of 221221201301 is 103102122122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 132622702276 + 88598499025 = 364174^2 + 297655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221221201301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221221201301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221201801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742352876 + ... + 742353173.

It is an arithmetic number, because the mean of its divisors is an integer number (55676476875).

Almost surely, 2^221221201301 is an apocalyptic number.

It is an amenable number.

221221201301 is a deficient number, since it is larger than the sum of its proper divisors (1484706199).

221221201301 is a wasteful number, since it uses less digits than its factorization.

221221201301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484706198.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221221201301 its reverse (103102122122), we get a palindrome (324323323423).

The spelling of 221221201301 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, three hundred one".