402400221100 has 36 divisors (see below), whose sum is σ = 873259998408. Its totient is φ = 160950592000.

The previous prime is 402400221079. The next prime is 402400221107. The reversal of 402400221100 is 1122004204.

It is not an unprimeable number, because it can be changed into a prime (402400221107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1727580 + ... + 1946620.

It is an arithmetic number, because the mean of its divisors is an integer number (24257222178).

Almost surely, 2^402400221100 is an apocalyptic number.

It is an amenable number.

402400221100 is an abundant number, since it is smaller than the sum of its proper divisors (470859777308).

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

402400221100 is a wasteful number, since it uses less digits than its factorization.

402400221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237426 (or 237419 counting only the distinct ones).

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

Adding to 402400221100 its reverse (1122004204), we get a palindrome (403522225304).

The spelling of 402400221100 in words is "four hundred two billion, four hundred million, two hundred twenty-one thousand, one hundred".