221221201341 has 16 divisors (see below), whose sum is σ = 340249434624. Its totient is φ = 125230692144.

The previous prime is 221221201339. The next prime is 221221201349. The reversal of 221221201341 is 143102122122.

It is a happy number.

It is not a de Polignac number, because 221221201341 - 2¹ = 221221201339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221201349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49223655 + ... + 49228148.

It is an arithmetic number, because the mean of its divisors is an integer number (21265589664).

Almost surely, 2^221221201341 is an apocalyptic number.

221221201341 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221221201341 is a deficient number, since it is larger than the sum of its proper divisors (119028233283).

221221201341 is a wasteful number, since it uses less digits than its factorization.

221221201341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98451920.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221221201341 its reverse (143102122122), we get a palindrome (364323323463).

The spelling of 221221201341 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, three hundred forty-one".