1131021012 has 48 divisors (see below), whose sum is σ = 2881432512. Its totient is φ = 342439680.

The previous prime is 1131021011. The next prime is 1131021013. The reversal of 1131021012 is 2101201311.

It is an interprime number because it is at equal distance from previous prime (1131021011) and next prime (1131021013).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131021011) 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, 188848 + ... + 194744.

It is an arithmetic number, because the mean of its divisors is an integer number (60029844).

Almost surely, 2^1131021012 is an apocalyptic number.

1131021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131021012 is an abundant number, since it is smaller than the sum of its proper divisors (1750411500).

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

1131021012 is a wasteful number, since it uses less digits than its factorization.

1131021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368 (or 7366 counting only the distinct ones).

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

The square root of 1131021012 is about 33630.6558366024. The cubic root of 1131021012 is about 1041.8940496923.

Adding to 1131021012 its reverse (2101201311), we get a palindrome (3232222323).

The spelling of 1131021012 in words is "one billion, one hundred thirty-one million, twenty-one thousand, twelve".