1211211220330 has 32 divisors (see below), whose sum is σ = 2188004410368. Its totient is φ = 482746992000.

The previous prime is 1211211220277. The next prime is 1211211220339. The reversal of 1211211220330 is 330221121121.

It is a junction number, because it is equal to n+sod(n) for n = 1211211220298 and 1211211220307.

It is not an unprimeable number, because it can be changed into a prime (1211211220339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035155 + ... + 8184505.

It is an arithmetic number, because the mean of its divisors is an integer number (68375137824).

Almost surely, 2^{1211211220330} is an apocalyptic number.

1211211220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211211220330 is a deficient number, since it is larger than the sum of its proper divisors (976793190038).

1211211220330 is a wasteful number, since it uses less digits than its factorization.

1211211220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152262.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211211220330 its reverse (330221121121), we get a palindrome (1541432341451).

The spelling of 1211211220330 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty thousand, three hundred thirty".