10142451721 has 2 divisors, whose sum is σ = 10142451722. Its totient is φ = 10142451720.

The previous prime is 10142451713. The next prime is 10142451727. The reversal of 10142451721 is 12715424101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5530004496 + 4612447225 = 74364^2 + 67915^2 .

It is a cyclic number.

It is not a de Polignac number, because 10142451721 - 2³ = 10142451713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10142451721.

It is not a weakly prime, because it can be changed into another prime (10142451727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5071225860 + 5071225861.

It is an arithmetic number, because the mean of its divisors is an integer number (5071225861).

Almost surely, 2^10142451721 is an apocalyptic number.

It is an amenable number.

10142451721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10142451721 is an equidigital number, since it uses as much as digits as its factorization.

10142451721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 10142451721 its reverse (12715424101), we get a palindrome (22857875822).

The spelling of 10142451721 in words is "ten billion, one hundred forty-two million, four hundred fifty-one thousand, seven hundred twenty-one".