1211022120320 has 64 divisors (see below), whose sum is σ = 2899018479600. Its totient is φ = 483753166848.

The previous prime is 1211022120293. The next prime is 1211022120331. The reversal of 1211022120320 is 230212201121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 807299 + ... + 1753218.

Almost surely, 2^{1211022120320} is an apocalyptic number.

1211022120320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211022120320 is an abundant number, since it is smaller than the sum of its proper divisors (1687996359280).

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

1211022120320 is an equidigital number, since it uses as much as digits as its factorization.

1211022120320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561275 (or 2561263 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1211022120320 its reverse (230212201121), we get a palindrome (1441234321441).

It can be divided in two parts, 121102 and 2120320, that added together give a palindrome (2241422).

The spelling of 1211022120320 in words is "one trillion, two hundred eleven billion, twenty-two million, one hundred twenty thousand, three hundred twenty".