11311021000 has 64 divisors (see below), whose sum is σ = 27083422080. Its totient is φ = 4419172800.

The previous prime is 11311020997. The next prime is 11311021031. The reversal of 11311021000 is 12011311.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88524 + ... + 174523.

It is an arithmetic number, because the mean of its divisors is an integer number (423178470).

Almost surely, 2^11311021000 is an apocalyptic number.

11311021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311021000 is an abundant number, since it is smaller than the sum of its proper divisors (15772401080).

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

11311021000 is a wasteful number, since it uses less digits than its factorization.

11311021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263111 (or 263097 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11311021000 its reverse (12011311), we get a palindrome (11323032311).

The spelling of 11311021000 in words is "eleven billion, three hundred eleven million, twenty-one thousand".