1213225211 has 8 divisors (see below), whose sum is σ = 1323820800. Its totient is φ = 1102680040.

The previous prime is 1213225163. The next prime is 1213225261. The reversal of 1213225211 is 1125223121.

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

It is a de Polignac number, because none of the positive numbers 2^k-1213225211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213225261) 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, 52250 + ... + 71808.

It is an arithmetic number, because the mean of its divisors is an integer number (165477600).

Almost surely, 2^1213225211 is an apocalyptic number.

1213225211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213225211 is a deficient number, since it is larger than the sum of its proper divisors (110595589).

1213225211 is a wasteful number, since it uses less digits than its factorization.

1213225211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25209.

The product of its digits is 240, while the sum is 20.

The square root of 1213225211 is about 34831.3825594104. The cubic root of 1213225211 is about 1066.5481714832.

Adding to 1213225211 its reverse (1125223121), we get a palindrome (2338448332).

The spelling of 1213225211 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, two hundred eleven".