1011001021120 has 56 divisors (see below), whose sum is σ = 2437920244800. Its totient is φ = 399281405952.

The previous prime is 1011001021111. The next prime is 1011001021139. The reversal of 1011001021120 is 211201001101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1011001021097 and 1011001021106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19970785 + ... + 20021344.

Almost surely, 2^{1011001021120} is an apocalyptic number.

1011001021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011001021120 is an abundant number, since it is smaller than the sum of its proper divisors (1426919223680).

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

1011001021120 is an equidigital number, since it uses as much as digits as its factorization.

1011001021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39992225 (or 39992215 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1011001021120 its reverse (211201001101), we get a palindrome (1222202022221).

The spelling of 1011001021120 in words is "one trillion, eleven billion, one million, twenty-one thousand, one hundred twenty".