1011021120 has 168 divisors, whose sum is σ = 3628924416. Its totient is φ = 257866752.

The previous prime is 1011021119. The next prime is 1011021149. The reversal of 1011021120 is 211201101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58609 + ... + 73871.

Almost surely, 2^1011021120 is an apocalyptic number.

1011021120 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 1011021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814462208).

1011021120 is an abundant number, since it is smaller than the sum of its proper divisors (2617903296).

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

1011021120 is a wasteful number, since it uses less digits than its factorization.

1011021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15309 (or 15296 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1011021120 is about 31796.5583043197. The cubic root of 1011021120 is about 1003.6602925784.

Adding to 1011021120 its reverse (211201101), we get a palindrome (1222222221).

The spelling of 1011021120 in words is "one billion, eleven million, twenty-one thousand, one hundred twenty".