1135721101 has 2 divisors, whose sum is σ = 1135721102. Its totient is φ = 1135721100.

The previous prime is 1135721099. The next prime is 1135721123. The reversal of 1135721101 is 1011275311.

It is an a-pointer prime, because the next prime (1135721123) can be obtained adding 1135721101 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613552900 + 522168201 = 24770^2 + 22851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135721101 - 2¹ = 1135721099 is a prime.

Together with 1135721099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135721131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567860550 + 567860551.

It is an arithmetic number, because the mean of its divisors is an integer number (567860551).

Almost surely, 2^1135721101 is an apocalyptic number.

It is an amenable number.

1135721101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135721101 is an equidigital number, since it uses as much as digits as its factorization.

1135721101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 1135721101 is about 33700.4614360100. The cubic root of 1135721101 is about 1043.3352923053.

Adding to 1135721101 its reverse (1011275311), we get a palindrome (2146996412).

The spelling of 1135721101 in words is "one billion, one hundred thirty-five million, seven hundred twenty-one thousand, one hundred one".