1021121323 has 4 divisors (see below), whose sum is σ = 1021371120. Its totient is φ = 1020871528.

The previous prime is 1021121293. The next prime is 1021121327. The reversal of 1021121323 is 3231211201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231211201 = 26399 ⋅122399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021121323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021121297 and 1021121306.

It is not an unprimeable number, because it can be changed into a prime (1021121327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118663 + ... + 126976.

It is an arithmetic number, because the mean of its divisors is an integer number (255342780).

Almost surely, 2^1021121323 is an apocalyptic number.

1021121323 is a deficient number, since it is larger than the sum of its proper divisors (249797).

1021121323 is an equidigital number, since it uses as much as digits as its factorization.

1021121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249796.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1021121323 is about 31954.9890158016. The cubic root of 1021121323 is about 1006.9914467575.

Adding to 1021121323 its reverse (3231211201), we get a palindrome (4252332524).

The spelling of 1021121323 in words is "one billion, twenty-one million, one hundred twenty-one thousand, three hundred twenty-three".