50721006001021 has 2 divisors, whose sum is σ = 50721006001022. Its totient is φ = 50721006001020.

The previous prime is 50721006000923. The next prime is 50721006001079. The reversal of 50721006001021 is 12010060012705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34438247664921 + 16282758336100 = 5868411^2 + 4035190^2 .

It is a cyclic number.

It is not a de Polignac number, because 50721006001021 - 2¹⁹ = 50721005476733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50721009001021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25360503000510 + 25360503000511.

It is an arithmetic number, because the mean of its divisors is an integer number (25360503000511).

Almost surely, 2^{50721006001021} is an apocalyptic number.

It is an amenable number.

50721006001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

50721006001021 is an equidigital number, since it uses as much as digits as its factorization.

50721006001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

Adding to 50721006001021 its reverse (12010060012705), we get a palindrome (62731066013726).

The spelling of 50721006001021 in words is "fifty trillion, seven hundred twenty-one billion, six million, one thousand, twenty-one".