140121203221321 has 32 divisors (see below), whose sum is σ = 168174223810560. Its totient is φ = 114213235852800.

The previous prime is 140121203221319. The next prime is 140121203221343. The reversal of 140121203221321 is 123122302121041.

It is not a de Polignac number, because 140121203221321 - 2¹ = 140121203221319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140121203221301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29366841 + ... + 33803161.

It is an arithmetic number, because the mean of its divisors is an integer number (5255444494080).

Almost surely, 2^{140121203221321} is an apocalyptic number.

It is an amenable number.

140121203221321 is a deficient number, since it is larger than the sum of its proper divisors (28053020589239).

140121203221321 is a wasteful number, since it uses less digits than its factorization.

140121203221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438885.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 140121203221321 its reverse (123122302121041), we get a palindrome (263243505342362).

The spelling of 140121203221321 in words is "one hundred forty trillion, one hundred twenty-one billion, two hundred three million, two hundred twenty-one thousand, three hundred twenty-one".