20001022100149 has 2 divisors, whose sum is σ = 20001022100150. Its totient is φ = 20001022100148.

The previous prime is 20001022100113. The next prime is 20001022100197. The reversal of 20001022100149 is 94100122010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15076772625924 + 4924249474225 = 3882882^2 + 2219065^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001022100149 - 2²⁵ = 20000988545717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001022107149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000511050074 + 10000511050075.

It is an arithmetic number, because the mean of its divisors is an integer number (10000511050075).

Almost surely, 2^{20001022100149} is an apocalyptic number.

It is an amenable number.

20001022100149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001022100149 is an equidigital number, since it uses as much as digits as its factorization.

20001022100149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20001022100149 in words is "twenty trillion, one billion, twenty-two million, one hundred thousand, one hundred forty-nine".