1212101220330 has 1536 divisors, whose sum is σ = 4679103283200. Its totient is φ = 216166579200.

The previous prime is 1212101220307. The next prime is 1212101220347. The reversal of 1212101220330 is 330221012121.

1212101220330 is a `hidden beast` number, since 1 + 2 + 1 + 210 + 122 + 0 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 767 ways as a sum of consecutive naturals, for example, 4472698095 + ... + 4472698365.

It is an arithmetic number, because the mean of its divisors is an integer number (3046291200).

Almost surely, 2^{1212101220330} is an apocalyptic number.

1212101220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212101220330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2339551641600).

1212101220330 is an abundant number, since it is smaller than the sum of its proper divisors (3467002062870).

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

1212101220330 is a wasteful number, since it uses less digits than its factorization.

1212101220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1212101220330 its reverse (330221012121), we get a palindrome (1542322232451).

The spelling of 1212101220330 in words is "one trillion, two hundred twelve billion, one hundred one million, two hundred twenty thousand, three hundred thirty".