1211321330 has 16 divisors (see below), whose sum is σ = 2217335040. Its totient is φ = 476315952.

The previous prime is 1211321327. The next prime is 1211321359. The reversal of 1211321330 is 331231121.

It is a junction number, because it is equal to n+sod(n) for n = 1211321299 and 1211321308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025954 + ... + 1027133.

It is an arithmetic number, because the mean of its divisors is an integer number (138583440).

Almost surely, 2^1211321330 is an apocalyptic number.

1211321330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211321330 is a deficient number, since it is larger than the sum of its proper divisors (1006013710).

1211321330 is a wasteful number, since it uses less digits than its factorization.

1211321330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053153.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1211321330 is about 34804.0418629791. The cubic root of 1211321330 is about 1065.9899778118.

Adding to 1211321330 its reverse (331231121), we get a palindrome (1542552451).

The spelling of 1211321330 in words is "one billion, two hundred eleven million, three hundred twenty-one thousand, three hundred thirty".