1021110122120 has 128 divisors (see below), whose sum is σ = 2514559178880. Its totient is φ = 370099968000.

The previous prime is 1021110122099. The next prime is 1021110122129. The reversal of 1021110122120 is 212210111201.

It is a junction number, because it is equal to n+sod(n) for n = 1021110122095 and 1021110122104.

It is not an unprimeable number, because it can be changed into a prime (1021110122129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318796439 + ... + 318799641.

It is an arithmetic number, because the mean of its divisors is an integer number (19644993585).

Almost surely, 2^{1021110122120} is an apocalyptic number.

1021110122120 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 1021110122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257279589440).

1021110122120 is an abundant number, since it is smaller than the sum of its proper divisors (1493449056760).

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

1021110122120 is a wasteful number, since it uses less digits than its factorization.

1021110122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021110122120 its reverse (212210111201), we get a palindrome (1233320233321).

The spelling of 1021110122120 in words is "one trillion, twenty-one billion, one hundred ten million, one hundred twenty-two thousand, one hundred twenty".