1213021323 has 12 divisors (see below), whose sum is σ = 1765939968. Its totient is φ = 802312560.

The previous prime is 1213021321. The next prime is 1213021339. The reversal of 1213021323 is 3231203121.

It is not a de Polignac number, because 1213021323 - 2¹ = 1213021321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213021296 and 1213021305.

It is not an unprimeable number, because it can be changed into a prime (1213021321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 529488 + ... + 531773.

It is an arithmetic number, because the mean of its divisors is an integer number (147161664).

Almost surely, 2^1213021323 is an apocalyptic number.

1213021323 is a deficient number, since it is larger than the sum of its proper divisors (552918645).

1213021323 is a wasteful number, since it uses less digits than its factorization.

1213021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061394 (or 1061391 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213021323 is about 34828.4556505166. The cubic root of 1213021323 is about 1066.4884220500.

Adding to 1213021323 its reverse (3231203121), we get a palindrome (4444224444).

The spelling of 1213021323 in words is "one billion, two hundred thirteen million, twenty-one thousand, three hundred twenty-three".