402221100 has 72 divisors (see below), whose sum is σ = 1181188288. Its totient is φ = 105652800.

The previous prime is 402221093. The next prime is 402221119. The reversal of 402221100 is 1122204.

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 23 ways as a sum of consecutive naturals, for example, 10095 + ... + 30105.

Almost surely, 2^402221100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590594144).

402221100 is an abundant number, since it is smaller than the sum of its proper divisors (778967188).

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

402221100 is a wasteful number, since it uses less digits than its factorization.

402221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20095 (or 20088 counting only the distinct ones).

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

The square root of 402221100 is about 20055.4506306889. The cubic root of 402221100 is about 738.1675503273.

Adding to 402221100 its reverse (1122204), we get a palindrome (403343304).

The spelling of 402221100 in words is "four hundred two million, two hundred twenty-one thousand, one hundred".