20103111289 has 2 divisors, whose sum is σ = 20103111290. Its totient is φ = 20103111288.

The previous prime is 20103111251. The next prime is 20103111341. The reversal of 20103111289 is 98211130102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10710594064 + 9392517225 = 103492^2 + 96915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103111289 - 2²¹ = 20101014137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20103111389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051555644 + 10051555645.

It is an arithmetic number, because the mean of its divisors is an integer number (10051555645).

Almost surely, 2^20103111289 is an apocalyptic number.

It is an amenable number.

20103111289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103111289 is an equidigital number, since it uses as much as digits as its factorization.

20103111289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 20103111289 in words is "twenty billion, one hundred three million, one hundred eleven thousand, two hundred eighty-nine".