2011321321400 has 48 divisors (see below), whose sum is σ = 4676822825640. Its totient is φ = 804442377600.

The previous prime is 2011321321391. The next prime is 2011321321403. The reversal of 2011321321400 is 41231231102.

It is a super-3 number, since 3×2011321321400³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011321321403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1350467 + ... + 2417933.

Almost surely, 2^{2011321321400} is an apocalyptic number.

2011321321400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011321321400 is an abundant number, since it is smaller than the sum of its proper divisors (2665501504240).

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

2011321321400 is a wasteful number, since it uses less digits than its factorization.

2011321321400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076904 (or 1076895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2011321321400 its reverse (41231231102), we get a palindrome (2052552552502).

The spelling of 2011321321400 in words is "two trillion, eleven billion, three hundred twenty-one million, three hundred twenty-one thousand, four hundred".