1000404222100 has 72 divisors (see below), whose sum is σ = 2204678141568. Its totient is φ = 393938688000.

The previous prime is 1000404222071. The next prime is 1000404222107. The reversal of 1000404222100 is 12224040001.

It is a super-2 number, since 2×1000404222100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000404222107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10680069 + ... + 10773331.

It is an arithmetic number, because the mean of its divisors is an integer number (30620529744).

Almost surely, 2^{1000404222100} is an apocalyptic number.

1000404222100 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 1000404222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102339070784).

1000404222100 is an abundant number, since it is smaller than the sum of its proper divisors (1204273919468).

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

1000404222100 is a wasteful number, since it uses less digits than its factorization.

1000404222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94945 (or 94938 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1000404222100 its reverse (12224040001), we get a palindrome (1012628262101).

The spelling of 1000404222100 in words is "one trillion, four hundred four million, two hundred twenty-two thousand, one hundred".