140111021 has 2 divisors, whose sum is σ = 140111022. Its totient is φ = 140111020.

The previous prime is 140111011. The next prime is 140111033. The reversal of 140111021 is 120111041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112126921 + 27984100 = 10589^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 140111021 - 2²⁶ = 73002157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140110993 and 140111011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140111011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70055510 + 70055511.

It is an arithmetic number, because the mean of its divisors is an integer number (70055511).

Almost surely, 2^140111021 is an apocalyptic number.

It is an amenable number.

140111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

140111021 is an equidigital number, since it uses as much as digits as its factorization.

140111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 140111021 is about 11836.8501299966. The cubic root of 140111021 is about 519.3866300831.

Adding to 140111021 its reverse (120111041), we get a palindrome (260222062).

The spelling of 140111021 in words is "one hundred forty million, one hundred eleven thousand, twenty-one".