1131021696 has 256 divisors, whose sum is σ = 3711951360. Its totient is φ = 297762816.

The previous prime is 1131021511. The next prime is 1131021709. The reversal of 1131021696 is 6961201311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2421655 + ... + 2422121.

It is an arithmetic number, because the mean of its divisors is an integer number (14499810).

Almost surely, 2^1131021696 is an apocalyptic number.

1131021696 is a gapful number since it is divisible by the number (16) 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 1131021696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855975680).

1131021696 is an abundant number, since it is smaller than the sum of its proper divisors (2580929664).

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

1131021696 is a wasteful number, since it uses less digits than its factorization.

1131021696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1131021696 is about 33630.6660058941. Note that the first 3 decimals coincide. The cubic root of 1131021696 is about 1041.8942597254.

The spelling of 1131021696 in words is "one billion, one hundred thirty-one million, twenty-one thousand, six hundred ninety-six".