140405211112321 has 4 divisors (see below), whose sum is σ = 140447463661872. Its totient is φ = 140362958562772.

The previous prime is 140405211112307. The next prime is 140405211112337. The reversal of 140405211112321 is 123211112504041.

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 140405211112321 - 2⁴³ = 131609118090113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140405211112321.

It is not an unprimeable number, because it can be changed into a prime (140405211112921) 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, 21126269791 + ... + 21126276436.

It is an arithmetic number, because the mean of its divisors is an integer number (35111865915468).

Almost surely, 2^{140405211112321} is an apocalyptic number.

It is an amenable number.

140405211112321 is a deficient number, since it is larger than the sum of its proper divisors (42252549551).

140405211112321 is an equidigital number, since it uses as much as digits as its factorization.

140405211112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42252549550.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 140405211112321 its reverse (123211112504041), we get a palindrome (263616323616362).

The spelling of 140405211112321 in words is "one hundred forty trillion, four hundred five billion, two hundred eleven million, one hundred twelve thousand, three hundred twenty-one".