1213223401 has 8 divisors (see below), whose sum is σ = 1311201864. Its totient is φ = 1115909760.

The previous prime is 1213223399. The next prime is 1213223419. The reversal of 1213223401 is 1043223121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12531600 + 1200691801 = 3540^2 + 34651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213223401 - 2¹ = 1213223399 is a prime.

It is a super-2 number, since 2×1213223401² = 2943822041468013602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213223491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162406 + ... + 169711.

It is an arithmetic number, because the mean of its divisors is an integer number (163900233).

Almost surely, 2^1213223401 is an apocalyptic number.

It is an amenable number.

1213223401 is a deficient number, since it is larger than the sum of its proper divisors (97978463).

1213223401 is a wasteful number, since it uses less digits than its factorization.

1213223401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332411.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1213223401 is about 34831.3565770844. The cubic root of 1213223401 is about 1066.5476410917.

Adding to 1213223401 its reverse (1043223121), we get a palindrome (2256446522).

The spelling of 1213223401 in words is "one billion, two hundred thirteen million, two hundred twenty-three thousand, four hundred one".