5012215721 has 2 divisors, whose sum is σ = 5012215722. Its totient is φ = 5012215720.

The previous prime is 5012215669. The next prime is 5012215739. The reversal of 5012215721 is 1275122105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2931031321 + 2081184400 = 54139^2 + 45620^2 .

It is a cyclic number.

It is not a de Polignac number, because 5012215721 - 2⁶ = 5012215657 is a prime.

It is not a weakly prime, because it can be changed into another prime (5012215781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2506107860 + 2506107861.

It is an arithmetic number, because the mean of its divisors is an integer number (2506107861).

Almost surely, 2^5012215721 is an apocalyptic number.

It is an amenable number.

5012215721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5012215721 is an equidigital number, since it uses as much as digits as its factorization.

5012215721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 5012215721 is about 70797.0036159723. The cubic root of 5012215721 is about 1711.3673867337.

Adding to 5012215721 its reverse (1275122105), we get a palindrome (6287337826).

The spelling of 5012215721 in words is "five billion, twelve million, two hundred fifteen thousand, seven hundred twenty-one".