921111361 has 2 divisors, whose sum is σ = 921111362. Its totient is φ = 921111360.

The previous prime is 921111349. The next prime is 921111397. The reversal of 921111361 is 163111129.

921111361 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., 874325761 + 46785600 = 29569^2 + 6840^2 .

It is an emirp because it is prime and its reverse (163111129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921111361 - 2¹⁵ = 921078593 is a prime.

It is a super-2 number, since 2×921111361² = 1696892278726544642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (921111761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460555680 + 460555681.

It is an arithmetic number, because the mean of its divisors is an integer number (460555681).

Almost surely, 2^921111361 is an apocalyptic number.

It is an amenable number.

921111361 is a deficient number, since it is larger than the sum of its proper divisors (1).

921111361 is an equidigital number, since it uses as much as digits as its factorization.

921111361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 25.

The square root of 921111361 is about 30349.8164903843. The cubic root of 921111361 is about 972.9802980814.

The spelling of 921111361 in words is "nine hundred twenty-one million, one hundred eleven thousand, three hundred sixty-one".