22111420400 has 120 divisors (see below), whose sum is σ = 54162252144. Its totient is φ = 8672716800.

The previous prime is 22111420399. The next prime is 22111420421. The reversal of 22111420400 is 402411122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6242630 + ... + 6246170.

Almost surely, 2^22111420400 is an apocalyptic number.

22111420400 is a gapful number since it is divisible by the number (20) 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 22111420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27081126072).

22111420400 is an abundant number, since it is smaller than the sum of its proper divisors (32050831744).

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

22111420400 is a wasteful number, since it uses less digits than its factorization.

22111420400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859 (or 3848 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22111420400 its reverse (402411122), we get a palindrome (22513831522).

The spelling of 22111420400 in words is "twenty-two billion, one hundred eleven million, four hundred twenty thousand, four hundred".