140221121 has 4 divisors (see below), whose sum is σ = 147601200. Its totient is φ = 132841044.

The previous prime is 140221097. The next prime is 140221223. The reversal of 140221121 is 121122041.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-140221121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140221096 and 140221105.

It is not an unprimeable number, because it can be changed into a prime (140221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690011 + ... + 3690048.

It is an arithmetic number, because the mean of its divisors is an integer number (36900300).

Almost surely, 2^140221121 is an apocalyptic number.

It is an amenable number.

140221121 is a deficient number, since it is larger than the sum of its proper divisors (7380079).

140221121 is an equidigital number, since it uses as much as digits as its factorization.

140221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380078.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 140221121 is about 11841.4999472195. The cubic root of 140221121 is about 519.5226400736.

Adding to 140221121 its reverse (121122041), we get a palindrome (261343162).

The spelling of 140221121 in words is "one hundred forty million, two hundred twenty-one thousand, one hundred twenty-one".