1001121001220 has 48 divisors (see below), whose sum is σ = 2233273109760. Its totient is φ = 375664909824.

The previous prime is 1001121001211. The next prime is 1001121001249. The reversal of 1001121001220 is 221001211001.

1001121001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4691180 + ... + 4899939.

It is an arithmetic number, because the mean of its divisors is an integer number (46526523120).

Almost surely, 2^{1001121001220} is an apocalyptic number.

1001121001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001121001220 is an abundant number, since it is smaller than the sum of its proper divisors (1232152108540).

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

1001121001220 is a wasteful number, since it uses less digits than its factorization.

1001121001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591452 (or 9591450 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001121001220 its reverse (221001211001), we get a palindrome (1222122212221).

The spelling of 1001121001220 in words is "one trillion, one billion, one hundred twenty-one million, one thousand, two hundred twenty".