140224210121 has 2 divisors, whose sum is σ = 140224210122. Its totient is φ = 140224210120.

The previous prime is 140224210117. The next prime is 140224210141. The reversal of 140224210121 is 121012422041.

It is an a-pointer prime, because the next prime (140224210141) can be obtained adding 140224210121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135284931721 + 4939278400 = 367811^2 + 70280^2 .

It is a cyclic number.

It is not a de Polignac number, because 140224210121 - 2² = 140224210117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140224210093 and 140224210102.

It is not a weakly prime, because it can be changed into another prime (140224210111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70112105060 + 70112105061.

It is an arithmetic number, because the mean of its divisors is an integer number (70112105061).

Almost surely, 2^140224210121 is an apocalyptic number.

It is an amenable number.

140224210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

140224210121 is an equidigital number, since it uses as much as digits as its factorization.

140224210121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 140224210121 its reverse (121012422041), we get a palindrome (261236632162).

The spelling of 140224210121 in words is "one hundred forty billion, two hundred twenty-four million, two hundred ten thousand, one hundred twenty-one".