1211226340 has 48 divisors (see below), whose sum is σ = 2612554560. Its totient is φ = 471516800.

The previous prime is 1211226323. The next prime is 1211226343. The reversal of 1211226340 is 436221121.

It is not an unprimeable number, because it can be changed into a prime (1211226343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114099 + ... + 124261.

It is an arithmetic number, because the mean of its divisors is an integer number (54428220).

Almost surely, 2^1211226340 is an apocalyptic number.

1211226340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211226340 is an abundant number, since it is smaller than the sum of its proper divisors (1401328220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211226340 is a wasteful number, since it uses less digits than its factorization.

1211226340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1211226340 is about 34802.6771958710. The cubic root of 1211226340 is about 1065.9621126388.

Adding to 1211226340 its reverse (436221121), we get a palindrome (1647447461).

The spelling of 1211226340 in words is "one billion, two hundred eleven million, two hundred twenty-six thousand, three hundred forty".