1211221412 has 6 divisors (see below), whose sum is σ = 2119637478. Its totient is φ = 605610704.

The previous prime is 1211221409. The next prime is 1211221433. The reversal of 1211221412 is 2141221121.

It can be written as a sum of positive squares in only one way, i.e., 918332416 + 292888996 = 30304^2 + 17114^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151402673 + ... + 151402680.

It is an arithmetic number, because the mean of its divisors is an integer number (353272913).

Almost surely, 2^1211221412 is an apocalyptic number.

It is an amenable number.

1211221412 is a deficient number, since it is larger than the sum of its proper divisors (908416066).

1211221412 is a wasteful number, since it uses less digits than its factorization.

1211221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302805357 (or 302805355 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

The square root of 1211221412 is about 34802.6063966479. The cubic root of 1211221412 is about 1065.9606669777.

Adding to 1211221412 its reverse (2141221121), we get a palindrome (3352442533).

The spelling of 1211221412 in words is "one billion, two hundred eleven million, two hundred twenty-one thousand, four hundred twelve".