1021201022120 has 128 divisors (see below), whose sum is σ = 2542623229440. Its totient is φ = 367159541760.

The previous prime is 1021201022099. The next prime is 1021201022213. The reversal of 1021201022120 is 212201021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021201022095 and 1021201022104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9974309 + ... + 10076171.

It is an arithmetic number, because the mean of its divisors is an integer number (19864243980).

Almost surely, 2^{1021201022120} is an apocalyptic number.

1021201022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021201022120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271311614720).

1021201022120 is an abundant number, since it is smaller than the sum of its proper divisors (1521422207320).

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

1021201022120 is a wasteful number, since it uses less digits than its factorization.

1021201022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102555 (or 102551 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021201022120 its reverse (212201021201), we get a palindrome (1233402043321).

The spelling of 1021201022120 in words is "one trillion, twenty-one billion, two hundred one million, twenty-two thousand, one hundred twenty".