1121311020 has 48 divisors (see below), whose sum is σ = 3151653120. Its totient is φ = 297875136.

The previous prime is 1121311003. The next prime is 1121311021. The reversal of 1121311020 is 201131211.

It is a super-4 number, since 4×1121311020⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1121310987 and 1121311005.

It is not an unprimeable number, because it can be changed into a prime (1121311021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19750 + ... + 51309.

It is an arithmetic number, because the mean of its divisors is an integer number (65659440).

Almost surely, 2^1121311020 is an apocalyptic number.

1121311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121311020 is an abundant number, since it is smaller than the sum of its proper divisors (2030342100).

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

1121311020 is a wasteful number, since it uses less digits than its factorization.

1121311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71334 (or 71332 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1121311020 is about 33485.9824404183. The cubic root of 1121311020 is about 1038.9038685355.

Adding to 1121311020 its reverse (201131211), we get a palindrome (1322442231).

The spelling of 1121311020 in words is "one billion, one hundred twenty-one million, three hundred eleven thousand, twenty".