1121931000 has 352 divisors, whose sum is σ = 4145216400. Its totient is φ = 283435200.

The previous prime is 1121930993. The next prime is 1121931001. The reversal of 1121931000 is 1391211.

It is a super-2 number, since 2×1121931000² = 2517458337522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121931001) by changing a digit.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 59048991 + ... + 59049009.

Almost surely, 2^1121931000 is an apocalyptic number.

1121931000 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 1121931000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2072608200).

1121931000 is an abundant number, since it is smaller than the sum of its proper divisors (3023285400).

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

1121931000 is an frugal number, since it uses more digits than its factorization.

1121931000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1121931000 is about 33495.2384675792. The cubic root of 1121931000 is about 1039.0953054447.

The spelling of 1121931000 in words is "one billion, one hundred twenty-one million, nine hundred thirty-one thousand".