1221011093 has 2 divisors, whose sum is σ = 1221011094. Its totient is φ = 1221011092.

The previous prime is 1221011081. The next prime is 1221011107. The reversal of 1221011093 is 3901101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728082289 + 492928804 = 26983^2 + 22202^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221011093 - 2²² = 1216816789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221011023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610505546 + 610505547.

It is an arithmetic number, because the mean of its divisors is an integer number (610505547).

Almost surely, 2^1221011093 is an apocalyptic number.

It is an amenable number.

1221011093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221011093 is an equidigital number, since it uses as much as digits as its factorization.

1221011093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1221011093 is about 34942.9691497446. The cubic root of 1221011093 is about 1068.8248352327.

The spelling of 1221011093 in words is "one billion, two hundred twenty-one million, eleven thousand, ninety-three".