20012100149 has 2 divisors, whose sum is σ = 20012100150. Its totient is φ = 20012100148.

The previous prime is 20012100133. The next prime is 20012100211. The reversal of 20012100149 is 94100121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11616959524 + 8395140625 = 107782^2 + 91625^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012100149 - 2⁴ = 20012100133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20012100149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012109149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006050074 + 10006050075.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050075).

Almost surely, 2^20012100149 is an apocalyptic number.

It is an amenable number.

20012100149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012100149 is an equidigital number, since it uses as much as digits as its factorization.

20012100149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20012100149 in words is "twenty billion, twelve million, one hundred thousand, one hundred forty-nine".