1011200110001 has 2 divisors, whose sum is σ = 1011200110002. Its totient is φ = 1011200110000.

The previous prime is 1011200109949. The next prime is 1011200110009. The reversal of 1011200110001 is 1000110021101.

It is a happy number.

It is an a-pointer prime, because the next prime (1011200110009) can be obtained adding 1011200110001 to its sum of digits (8).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992683432225 + 18516677776 = 996335^2 + 136076^2 .

It is an emirp because it is prime and its reverse (1000110021101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011200110001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011200110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505600055000 + 505600055001.

It is an arithmetic number, because the mean of its divisors is an integer number (505600055001).

Almost surely, 2^{1011200110001} is an apocalyptic number.

It is an amenable number.

1011200110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011200110001 is an equidigital number, since it uses as much as digits as its factorization.

1011200110001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1011200110001 its reverse (1000110021101), we get a palindrome (2011310131102).

The spelling of 1011200110001 in words is "one trillion, eleven billion, two hundred million, one hundred ten thousand, one".