1011022721 has 2 divisors, whose sum is σ = 1011022722. Its totient is φ = 1011022720.

The previous prime is 1011022717. The next prime is 1011022757. The reversal of 1011022721 is 1272201101.

1011022721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988222096 + 22800625 = 31436^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011022721 - 2² = 1011022717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011022721.

It is not a weakly prime, because it can be changed into another prime (1011022921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505511360 + 505511361.

It is an arithmetic number, because the mean of its divisors is an integer number (505511361).

Almost surely, 2^1011022721 is an apocalyptic number.

It is an amenable number.

1011022721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011022721 is an equidigital number, since it uses as much as digits as its factorization.

1011022721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 1011022721 is about 31796.5834799904. The cubic root of 1011022721 is about 1003.6608223593.

Adding to 1011022721 its reverse (1272201101), we get a palindrome (2283223822).

It can be divided in two parts, 101102 and 2721, that added together give a cube (103823 = 47³).

The spelling of 1011022721 in words is "one billion, eleven million, twenty-two thousand, seven hundred twenty-one".