140234242431221 has 4 divisors (see below), whose sum is σ = 140767452478752. Its totient is φ = 139701032383692.

The previous prime is 140234242431169. The next prime is 140234242431223. The reversal of 140234242431221 is 122134242432041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140234242431221 - 2¹⁴ = 140234242414837 is a prime.

It is a super-3 number, since 3×140234242431221³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140234242431223) 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, 266605023371 + ... + 266605023896.

It is an arithmetic number, because the mean of its divisors is an integer number (35191863119688).

Almost surely, 2^{140234242431221} is an apocalyptic number.

It is an amenable number.

140234242431221 is a deficient number, since it is larger than the sum of its proper divisors (533210047531).

140234242431221 is an equidigital number, since it uses as much as digits as its factorization.

140234242431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533210047530.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 140234242431221 its reverse (122134242432041), we get a palindrome (262368484863262).

The spelling of 140234242431221 in words is "one hundred forty trillion, two hundred thirty-four billion, two hundred forty-two million, four hundred thirty-one thousand, two hundred twenty-one".