1068783052921 has 2 divisors, whose sum is σ = 1068783052922. Its totient is φ = 1068783052920.

The previous prime is 1068783052907. The next prime is 1068783052973. The reversal of 1068783052921 is 1292503878601.

It is a happy number.

It is an a-pointer prime, because the next prime (1068783052973) can be obtained adding 1068783052921 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538491792400 + 530291260521 = 733820^2 + 728211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068783052921 - 2⁷ = 1068783052793 is a prime.

It is a super-2 number, since 2×1068783052921² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1068783052621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534391526460 + 534391526461.

It is an arithmetic number, because the mean of its divisors is an integer number (534391526461).

Almost surely, 2^{1068783052921} is an apocalyptic number.

It is an amenable number.

1068783052921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068783052921 is an equidigital number, since it uses as much as digits as its factorization.

1068783052921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 1068783052921 in words is "one trillion, sixty-eight billion, seven hundred eighty-three million, fifty-two thousand, nine hundred twenty-one".