13421112221 has 8 divisors (see below), whose sum is σ = 14642201088. Its totient is φ = 12200188000.

The previous prime is 13421112203. The next prime is 13421112253. The reversal of 13421112221 is 12221112431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13421112221 - 2¹⁸ = 13420850077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13421112193 and 13421112202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421114221) 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, 181841 + ... + 244761.

It is an arithmetic number, because the mean of its divisors is an integer number (1830275136).

Almost surely, 2^13421112221 is an apocalyptic number.

13421112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13421112221 is a deficient number, since it is larger than the sum of its proper divisors (1221088867).

13421112221 is a wasteful number, since it uses less digits than its factorization.

13421112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82323.

The product of its digits is 192, while the sum is 20.

Adding to 13421112221 its reverse (12221112431), we get a palindrome (25642224652).

The spelling of 13421112221 in words is "thirteen billion, four hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".