1092135221 has 2 divisors, whose sum is σ = 1092135222. Its totient is φ = 1092135220.

The previous prime is 1092135217. The next prime is 1092135223. The reversal of 1092135221 is 1225312901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1063672996 + 28462225 = 32614^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1092135221 - 2² = 1092135217 is a prime.

It is a Sophie Germain prime.

Together with 1092135223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1092135223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546067610 + 546067611.

It is an arithmetic number, because the mean of its divisors is an integer number (546067611).

Almost surely, 2^1092135221 is an apocalyptic number.

It is an amenable number.

1092135221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1092135221 is an equidigital number, since it uses as much as digits as its factorization.

1092135221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1092135221 is about 33047.4692071874. The cubic root of 1092135221 is about 1029.8140302698.

The spelling of 1092135221 in words is "one billion, ninety-two million, one hundred thirty-five thousand, two hundred twenty-one".