2001223105400 has 48 divisors (see below), whose sum is σ = 4926540417840. Its totient is φ = 753401638400.

The previous prime is 2001223105393. The next prime is 2001223105421. The reversal of 2001223105400 is 45013221002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294294116 + ... + 294300915.

It is an arithmetic number, because the mean of its divisors is an integer number (102636258705).

Almost surely, 2^{2001223105400} is an apocalyptic number.

2001223105400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001223105400 is an abundant number, since it is smaller than the sum of its proper divisors (2925317312440).

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

2001223105400 is a wasteful number, since it uses less digits than its factorization.

2001223105400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588595064 (or 588595055 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 2001223105400 its reverse (45013221002), we get a palindrome (2046236326402).

The spelling of 2001223105400 in words is "two trillion, one billion, two hundred twenty-three million, one hundred five thousand, four hundred".