1223821094 has 4 divisors (see below), whose sum is σ = 1835731644. Its totient is φ = 611910546.

The previous prime is 1223821063. The next prime is 1223821097. The reversal of 1223821094 is 4901283221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4901283221 = 97 ⋅50528693.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223821094.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223821097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305955272 + ... + 305955275.

It is an arithmetic number, because the mean of its divisors is an integer number (458932911).

Almost surely, 2^1223821094 is an apocalyptic number.

1223821094 is a deficient number, since it is larger than the sum of its proper divisors (611910550).

1223821094 is an equidigital number, since it uses as much as digits as its factorization.

1223821094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611910549.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1223821094 is about 34983.1544318119. The cubic root of 1223821094 is about 1069.6441283127.

The spelling of 1223821094 in words is "one billion, two hundred twenty-three million, eight hundred twenty-one thousand, ninety-four".