1213224001 has 4 divisors (see below), whose sum is σ = 1323517104. Its totient is φ = 1102930900.

The previous prime is 1213223983. The next prime is 1213224013. The reversal of 1213224001 is 1004223121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1004223121 = 11 ⋅91293011.

It is a cyclic number.

It is not a de Polignac number, because 1213224001 - 2¹⁷ = 1213092929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213224041) 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, 55146535 + ... + 55146556.

It is an arithmetic number, because the mean of its divisors is an integer number (330879276).

Almost surely, 2^1213224001 is an apocalyptic number.

1213224001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213224001 is a deficient number, since it is larger than the sum of its proper divisors (110293103).

1213224001 is a wasteful number, since it uses less digits than its factorization.

1213224001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110293102.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1213224001 is about 34831.3651900123. The cubic root of 1213224001 is about 1066.5478169121.

Adding to 1213224001 its reverse (1004223121), we get a palindrome (2217447122).

The spelling of 1213224001 in words is "one billion, two hundred thirteen million, two hundred twenty-four thousand, one".