50055500000021 has 2 divisors, whose sum is σ = 50055500000022. Its totient is φ = 50055500000020.

The previous prime is 50055499999957. The next prime is 50055500000069. The reversal of 50055500000021 is 12000000555005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30850192947025 + 19205307052996 = 5554295^2 + 4382386^2 .

It is a cyclic number.

It is not a de Polignac number, because 50055500000021 - 2⁶ = 50055499999957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50055500000621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25027750000010 + 25027750000011.

It is an arithmetic number, because the mean of its divisors is an integer number (25027750000011).

Almost surely, 2^{50055500000021} is an apocalyptic number.

It is an amenable number.

50055500000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

50055500000021 is an equidigital number, since it uses as much as digits as its factorization.

50055500000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1250, while the sum is 23.

Adding to 50055500000021 its reverse (12000000555005), we get a palindrome (62055500555026).

The spelling of 50055500000021 in words is "fifty trillion, fifty-five billion, five hundred million, twenty-one", and thus it is an aban number.