1211032220020 has 192 divisors, whose sum is σ = 3011459254272. Its totient is φ = 400458240000.

The previous prime is 1211032220003. The next prime is 1211032220023. The reversal of 1211032220020 is 200222301121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211032219976 and 1211032220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211032220023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 528141994 + ... + 528144286.

It is an arithmetic number, because the mean of its divisors is an integer number (15684683616).

Almost surely, 2^{1211032220020} is an apocalyptic number.

1211032220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211032220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505729627136).

1211032220020 is an abundant number, since it is smaller than the sum of its proper divisors (1800427034252).

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

1211032220020 is a wasteful number, since it uses less digits than its factorization.

1211032220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 3360 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1211032220020 its reverse (200222301121), we get a palindrome (1411254521141).

The spelling of 1211032220020 in words is "one trillion, two hundred eleven billion, thirty-two million, two hundred twenty thousand, twenty".