1100021149 has 2 divisors, whose sum is σ = 1100021150. Its totient is φ = 1100021148.

The previous prime is 1100021129. The next prime is 1100021191. The reversal of 1100021149 is 9411200011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097596900 + 2424249 = 33130^2 + 1557^2 .

It is an emirp because it is prime and its reverse (9411200011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1100021149 - 2²⁵ = 1066466717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100021129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010574 + 550010575.

It is an arithmetic number, because the mean of its divisors is an integer number (550010575).

Almost surely, 2^1100021149 is an apocalyptic number.

It is an amenable number.

1100021149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100021149 is an equidigital number, since it uses as much as digits as its factorization.

1100021149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1100021149 is about 33166.5667351928. The cubic root of 1100021149 is about 1032.2867310783.

The spelling of 1100021149 in words is "one billion, one hundred million, twenty-one thousand, one hundred forty-nine".