1221100093 has 4 divisors (see below), whose sum is σ = 1221751840. Its totient is φ = 1220448348.

The previous prime is 1221100063. The next prime is 1221100121. The reversal of 1221100093 is 3900011221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1221100093 - 2¹³ = 1221091901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221100093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221100033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323055 + ... + 326812.

It is an arithmetic number, because the mean of its divisors is an integer number (305437960).

Almost surely, 2^1221100093 is an apocalyptic number.

It is an amenable number.

1221100093 is a deficient number, since it is larger than the sum of its proper divisors (651747).

1221100093 is an equidigital number, since it uses as much as digits as its factorization.

1221100093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651746.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1221100093 is about 34944.2426302245. The cubic root of 1221100093 is about 1068.8508036288.

The spelling of 1221100093 in words is "one billion, two hundred twenty-one million, one hundred thousand, ninety-three".