10140121 has 2 divisors, whose sum is σ = 10140122. Its totient is φ = 10140120.

The previous prime is 10140113. The next prime is 10140127. The reversal of 10140121 is 12104101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7371225 + 2768896 = 2715^2 + 1664^2 .

It is an emirp because it is prime and its reverse (12104101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10140121 - 2³ = 10140113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10140098 and 10140107.

It is not a weakly prime, because it can be changed into another prime (10140127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5070060 + 5070061.

It is an arithmetic number, because the mean of its divisors is an integer number (5070061).

Almost surely, 2^10140121 is an apocalyptic number.

It is an amenable number.

10140121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10140121 is an equidigital number, since it uses as much as digits as its factorization.

10140121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 10140121 is about 3184.3556648088. The cubic root of 10140121 is about 216.4450770689.

Adding to 10140121 its reverse (12104101), we get a palindrome (22244222).

The spelling of 10140121 in words is "ten million, one hundred forty thousand, one hundred twenty-one".