1020021110120 has 16 divisors (see below), whose sum is σ = 2295047497860. Its totient is φ = 408008444032.

The previous prime is 1020021110111. The next prime is 1020021110161. The reversal of 1020021110120 is 210111200201.

It can be written as a sum of positive squares in 2 ways, for example, as 1019401199716 + 619910404 = 1009654^2 + 24898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12750263837 + ... + 12750263916.

Almost surely, 2^{1020021110120} is an apocalyptic number.

1020021110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020021110120 is an abundant number, since it is smaller than the sum of its proper divisors (1275026387740).

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

1020021110120 is a wasteful number, since it uses less digits than its factorization.

1020021110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25500527764 (or 25500527760 counting only the distinct ones).

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

Adding to 1020021110120 its reverse (210111200201), we get a palindrome (1230132310321).

The spelling of 1020021110120 in words is "one trillion, twenty billion, twenty-one million, one hundred ten thousand, one hundred twenty".