10140423221 has 2 divisors, whose sum is σ = 10140423222. Its totient is φ = 10140423220.

The previous prime is 10140423203. The next prime is 10140423257. The reversal of 10140423221 is 12232404101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9406284196 + 734139025 = 96986^2 + 27095^2 .

It is a cyclic number.

It is not a de Polignac number, because 10140423221 - 2¹⁸ = 10140161077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10140423193 and 10140423202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10140423121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5070211610 + 5070211611.

It is an arithmetic number, because the mean of its divisors is an integer number (5070211611).

Almost surely, 2^10140423221 is an apocalyptic number.

It is an amenable number.

10140423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10140423221 is an equidigital number, since it uses as much as digits as its factorization.

10140423221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10140423221 its reverse (12232404101), we get a palindrome (22372827322).

The spelling of 10140423221 in words is "ten billion, one hundred forty million, four hundred twenty-three thousand, two hundred twenty-one".