19109291101 has 2 divisors, whose sum is σ = 19109291102. Its totient is φ = 19109291100.

The previous prime is 19109291083. The next prime is 19109291107. The reversal of 19109291101 is 10119290191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17786223225 + 1323067876 = 133365^2 + 36374^2 .

It is a cyclic number.

It is not a de Polignac number, because 19109291101 - 2²⁷ = 18975073373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19109291107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9554645550 + 9554645551.

It is an arithmetic number, because the mean of its divisors is an integer number (9554645551).

Almost surely, 2^19109291101 is an apocalyptic number.

It is an amenable number.

19109291101 is a deficient number, since it is larger than the sum of its proper divisors (1).

19109291101 is an equidigital number, since it uses as much as digits as its factorization.

19109291101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 19109291101 in words is "nineteen billion, one hundred nine million, two hundred ninety-one thousand, one hundred one".