1211021311330 has 16 divisors (see below), whose sum is σ = 2230532276544. Its totient is φ = 473143209840.

The previous prime is 1211021311289. The next prime is 1211021311333. The reversal of 1211021311330 is 331131201121.

It is a junction number, because it is equal to n+sod(n) for n = 1211021311298 and 1211021311307.

It is not an unprimeable number, because it can be changed into a prime (1211021311333) 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, 1408163886 + ... + 1408164745.

It is an arithmetic number, because the mean of its divisors is an integer number (139408267284).

Almost surely, 2^{1211021311330} is an apocalyptic number.

1211021311330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211021311330 is a deficient number, since it is larger than the sum of its proper divisors (1019510965214).

1211021311330 is a wasteful number, since it uses less digits than its factorization.

1211021311330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816328681.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1211021311330 its reverse (331131201121), we get a palindrome (1542152512451).

The spelling of 1211021311330 in words is "one trillion, two hundred eleven billion, twenty-one million, three hundred eleven thousand, three hundred thirty".