221440121243 has 8 divisors (see below), whose sum is σ = 242267215680. Its totient is φ = 200729055880.

The previous prime is 221440121239. The next prime is 221440121251. The reversal of 221440121243 is 342121044122.

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

It is a cyclic number.

It is not a de Polignac number, because 221440121243 - 2² = 221440121239 is a prime.

It is a super-2 number, since 2×221440121243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221440129243) 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, 29003273 + ... + 29010906.

It is an arithmetic number, because the mean of its divisors is an integer number (30283401960).

Almost surely, 2^221440121243 is an apocalyptic number.

221440121243 is a deficient number, since it is larger than the sum of its proper divisors (20827094437).

221440121243 is a wasteful number, since it uses less digits than its factorization.

221440121243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58014537.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 221440121243 its reverse (342121044122), we get a palindrome (563561165365).

The spelling of 221440121243 in words is "two hundred twenty-one billion, four hundred forty million, one hundred twenty-one thousand, two hundred forty-three".