1212201121024 has 72 divisors (see below), whose sum is σ = 2503686585960. Its totient is φ = 585064316928.

The previous prime is 1212201120967. The next prime is 1212201121031. The reversal of 1212201121024 is 4201211022121.

It can be written as a sum of positive squares in 4 ways, for example, as 148662682624 + 1063538438400 = 385568^2 + 1031280^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212201120992 and 1212201121010.

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, 36635752 + ... + 36668824.

It is an arithmetic number, because the mean of its divisors is an integer number (34773424805).

Almost surely, 2^{1212201121024} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212201121024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251843292980).

1212201121024 is an abundant number, since it is smaller than the sum of its proper divisors (1291485464936).

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

1212201121024 is an equidigital number, since it uses as much as digits as its factorization.

1212201121024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38055 (or 38041 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212201121024 its reverse (4201211022121), we get a palindrome (5413412143145).

The spelling of 1212201121024 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred twenty-one thousand, twenty-four".