221234343401 has 8 divisors (see below), whose sum is σ = 221503262280. Its totient is φ = 220965591168.

The previous prime is 221234343389. The next prime is 221234343443. The reversal of 221234343401 is 104343432122.

It can be written as a sum of positive squares in 4 ways, for example, as 1483405225 + 219750938176 = 38515^2 + 468776^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221234343401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221234343481) 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, 2725535 + ... + 2805531.

It is an arithmetic number, because the mean of its divisors is an integer number (27687907785).

Almost surely, 2^221234343401 is an apocalyptic number.

It is an amenable number.

221234343401 is a deficient number, since it is larger than the sum of its proper divisors (268918879).

221234343401 is a wasteful number, since it uses less digits than its factorization.

221234343401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83323.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 221234343401 its reverse (104343432122), we get a palindrome (325577775523).

The spelling of 221234343401 in words is "two hundred twenty-one billion, two hundred thirty-four million, three hundred forty-three thousand, four hundred one".