11312001000 has 256 divisors, whose sum is σ = 40569984000. Its totient is φ = 2912313600.

The previous prime is 11312000963. The next prime is 11312001007. The reversal of 11312001000 is 10021311.

It is a super-2 number, since 2×11312001000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11312001007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 775777 + ... + 790223.

It is an arithmetic number, because the mean of its divisors is an integer number (158476500).

Almost surely, 2^11312001000 is an apocalyptic number.

11312001000 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 11312001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20284992000).

11312001000 is an abundant number, since it is smaller than the sum of its proper divisors (29257983000).

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

11312001000 is a wasteful number, since it uses less digits than its factorization.

11312001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14506 (or 14486 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 11312001000 its reverse (10021311), we get a palindrome (11322022311).

The spelling of 11312001000 in words is "eleven billion, three hundred twelve million, one thousand".