20010100051 has 2 divisors, whose sum is σ = 20010100052. Its totient is φ = 20010100050.

The previous prime is 20010100043. The next prime is 20010100057. The reversal of 20010100051 is 15000101002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20010100051 - 2³ = 20010100043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010100057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005050025 + 10005050026.

It is an arithmetic number, because the mean of its divisors is an integer number (10005050026).

Almost surely, 2^20010100051 is an apocalyptic number.

20010100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010100051 is an equidigital number, since it uses as much as digits as its factorization.

20010100051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10, while the sum is 10.

Adding to 20010100051 its reverse (15000101002), we get a palindrome (35010201053).

The spelling of 20010100051 in words is "twenty billion, ten million, one hundred thousand, fifty-one".