1211001201120 has 96 divisors (see below), whose sum is σ = 3824167243680. Its totient is φ = 322128281600.

The previous prime is 1211001201043. The next prime is 1211001201121. The reversal of 1211001201120 is 211021001121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1211001201120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1211001201096 and 1211001201105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211001201121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2953305 + ... + 3338264.

It is an arithmetic number, because the mean of its divisors is an integer number (39835075455).

Almost surely, 2^{1211001201120} is an apocalyptic number.

1211001201120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211001201120 is an abundant number, since it is smaller than the sum of its proper divisors (2613166042560).

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

1211001201120 is a wasteful number, since it uses less digits than its factorization.

1211001201120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291988 (or 6291980 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1211001201120 its reverse (211021001121), we get a palindrome (1422022202241).

The spelling of 1211001201120 in words is "one trillion, two hundred eleven billion, one million, two hundred one thousand, one hundred twenty".