1121891364 has 192 divisors, whose sum is σ = 3359784960. Its totient is φ = 320544000.

The previous prime is 1121891359. The next prime is 1121891383. The reversal of 1121891364 is 4631981211.

1121891364 is a `hidden beast` number, since 112 + 189 + 1 + 364 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1509577 + ... + 1510319.

It is an arithmetic number, because the mean of its divisors is an integer number (17498880).

Almost surely, 2^1121891364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121891364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679892480).

1121891364 is an abundant number, since it is smaller than the sum of its proper divisors (2237893596).

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

1121891364 is a wasteful number, since it uses less digits than its factorization.

1121891364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 831 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1121891364 is about 33494.6467961673. The cubic root of 1121891364 is about 1039.0830687842.

The spelling of 1121891364 in words is "one billion, one hundred twenty-one million, eight hundred ninety-one thousand, three hundred sixty-four".