1211213344 has 24 divisors (see below), whose sum is σ = 2601356688. Its totient is φ = 550551360.

The previous prime is 1211213329. The next prime is 1211213347. The reversal of 1211213344 is 4433121121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1211213347) 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, 1720122 + ... + 1720825.

It is an arithmetic number, because the mean of its divisors is an integer number (108389862).

Almost surely, 2^1211213344 is an apocalyptic number.

It is an amenable number.

1211213344 is an abundant number, since it is smaller than the sum of its proper divisors (1390143344).

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

1211213344 is a wasteful number, since it uses less digits than its factorization.

1211213344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440968 (or 3440960 counting only the distinct ones).

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

The square root of 1211213344 is about 34802.4904855960. The cubic root of 1211213344 is about 1065.9583001686.

Adding to 1211213344 its reverse (4433121121), we get a palindrome (5644334465).

The spelling of 1211213344 in words is "one billion, two hundred eleven million, two hundred thirteen thousand, three hundred forty-four".