2221401000 has 512 divisors, whose sum is σ = 8722022400. Its totient is φ = 458265600.

The previous prime is 2221400983. The next prime is 2221401011. The reversal of 2221401000 is 1041222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21566949 + ... + 21567051.

It is an arithmetic number, because the mean of its divisors is an integer number (17035200).

Almost surely, 2^2221401000 is an apocalyptic number.

2221401000 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 2221401000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4361011200).

2221401000 is an abundant number, since it is smaller than the sum of its proper divisors (6500621400).

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

2221401000 is a wasteful number, since it uses less digits than its factorization.

2221401000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2221401000 is about 47131.7408971916. The cubic root of 2221401000 is about 1304.7951117688.

Adding to 2221401000 its reverse (1041222), we get a palindrome (2222442222).

The spelling of 2221401000 in words is "two billion, two hundred twenty-one million, four hundred one thousand".