1081037821 has 2 divisors, whose sum is σ = 1081037822. Its totient is φ = 1081037820.

The previous prime is 1081037809. The next prime is 1081037833. The reversal of 1081037821 is 1287301801.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1081037809) and next prime (1081037833).

It can be written as a sum of positive squares in only one way, i.e., 626751225 + 454286596 = 25035^2 + 21314^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081037821 - 2¹⁵ = 1081005053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081038821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540518910 + 540518911.

It is an arithmetic number, because the mean of its divisors is an integer number (540518911).

Almost surely, 2^1081037821 is an apocalyptic number.

It is an amenable number.

1081037821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081037821 is an equidigital number, since it uses as much as digits as its factorization.

1081037821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1081037821 is about 32879.1396024896. The cubic root of 1081037821 is about 1026.3141014881.

The spelling of 1081037821 in words is "one billion, eighty-one million, thirty-seven thousand, eight hundred twenty-one".