1021011120108 has 72 divisors (see below), whose sum is σ = 2964560350752. Its totient is φ = 290236649472.

The previous prime is 1021011120083. The next prime is 1021011120109. The reversal of 1021011120108 is 8010211101201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021011120109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10233685 + ... + 10332972.

It is an arithmetic number, because the mean of its divisors is an integer number (41174449316).

Almost surely, 2^{1021011120108} is an apocalyptic number.

1021011120108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1021011120108 is an abundant number, since it is smaller than the sum of its proper divisors (1943549230644).

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

1021011120108 is a wasteful number, since it uses less digits than its factorization.

1021011120108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20566871 (or 20566866 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 1021011120108 its reverse (8010211101201), we get a palindrome (9031222221309).

The spelling of 1021011120108 in words is "one trillion, twenty-one billion, eleven million, one hundred twenty thousand, one hundred eight".