1920011091101 has 2 divisors, whose sum is σ = 1920011091102. Its totient is φ = 1920011091100.

The previous prime is 1920011091067. The next prime is 1920011091109. The reversal of 1920011091101 is 1011901100291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186735711876 + 733275379225 = 1089374^2 + 856315^2 .

It is an emirp because it is prime and its reverse (1011901100291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920011091101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920011091109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960005545550 + 960005545551.

It is an arithmetic number, because the mean of its divisors is an integer number (960005545551).

Almost surely, 2^{1920011091101} is an apocalyptic number.

It is an amenable number.

1920011091101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920011091101 is an equidigital number, since it uses as much as digits as its factorization.

1920011091101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 26.

Adding to 1920011091101 its reverse (1011901100291), we get a palindrome (2931912191392).

The spelling of 1920011091101 in words is "one trillion, nine hundred twenty billion, eleven million, ninety-one thousand, one hundred one".