1011120021020 has 24 divisors (see below), whose sum is σ = 2123566918368. Its totient is φ = 404407080000.

The previous prime is 1011120021013. The next prime is 1011120021029. The reversal of 1011120021020 is 201200211101.

It is a junction number, because it is equal to n+sod(n) for n = 1011120020992 and 1011120021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011120021029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2355056 + ... + 2751095.

It is an arithmetic number, because the mean of its divisors is an integer number (88481954932).

Almost surely, 2^{1011120021020} is an apocalyptic number.

1011120021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011120021020 is an abundant number, since it is smaller than the sum of its proper divisors (1112446897348).

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

1011120021020 is a wasteful number, since it uses less digits than its factorization.

1011120021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116061 (or 5116059 counting only the distinct ones).

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

Adding to 1011120021020 its reverse (201200211101), we get a palindrome (1212320232121).

The spelling of 1011120021020 in words is "one trillion, eleven billion, one hundred twenty million, twenty-one thousand, twenty".