1211222120120 has 32 divisors (see below), whose sum is σ = 2725366802400. Its totient is φ = 484468042368.

The previous prime is 1211222120093. The next prime is 1211222120123. The reversal of 1211222120120 is 210212221121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211222120123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310442 + ... + 1587078.

It is an arithmetic number, because the mean of its divisors is an integer number (85167712575).

Almost surely, 2^{1211222120120} is an apocalyptic number.

1211222120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211222120120 is an abundant number, since it is smaller than the sum of its proper divisors (1514144682280).

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

1211222120120 is a wasteful number, since it uses less digits than its factorization.

1211222120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300367 (or 1300363 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211222120120 its reverse (210212221121), we get a palindrome (1421434341241).

The spelling of 1211222120120 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty".