1211233330020 has 48 divisors (see below), whose sum is σ = 3875946657408. Its totient is φ = 276853332480.

The previous prime is 1211233330009. The next prime is 1211233330061. The reversal of 1211233330020 is 200333321121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441944021 + ... + 1441944860.

It is an arithmetic number, because the mean of its divisors is an integer number (80748888696).

Almost surely, 2^{1211233330020} is an apocalyptic number.

1211233330020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211233330020 is an abundant number, since it is smaller than the sum of its proper divisors (2664713327388).

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

1211233330020 is a wasteful number, since it uses less digits than its factorization.

1211233330020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883888900 (or 2883888898 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1211233330020 its reverse (200333321121), we get a palindrome (1411566651141).

The spelling of 1211233330020 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, three hundred thirty thousand, twenty".