1211201020000 has 60 divisors (see below), whose sum is σ = 2979736238556. Its totient is φ = 484480400000.

The previous prime is 1211201019997. The next prime is 1211201020021. The reversal of 1211201020000 is 201021121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 30260026 + ... + 30300025.

Almost surely, 2^{1211201020000} is an apocalyptic number.

1211201020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211201020000 is an abundant number, since it is smaller than the sum of its proper divisors (1768535218556).

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

1211201020000 is an frugal number, since it uses more digits than its factorization.

1211201020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60560081 (or 60560058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1211201020000 its reverse (201021121), we get a palindrome (1211402041121).

The spelling of 1211201020000 in words is "one trillion, two hundred eleven billion, two hundred one million, twenty thousand".