400200221220 has 24 divisors (see below), whose sum is σ = 1120560619584. Its totient is φ = 106720058976.

The previous prime is 400200221219. The next prime is 400200221249. The reversal of 400200221220 is 22122002004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 400200221220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335001784 + ... + 3335001903.

It is an arithmetic number, because the mean of its divisors is an integer number (46690025816).

Almost surely, 2^400200221220 is an apocalyptic number.

It is an amenable number.

400200221220 is an abundant number, since it is smaller than the sum of its proper divisors (720360398364).

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

400200221220 is a wasteful number, since it uses less digits than its factorization.

400200221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670003699 (or 6670003697 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 400200221220 its reverse (22122002004), we get a palindrome (422322223224).

The spelling of 400200221220 in words is "four hundred billion, two hundred million, two hundred twenty-one thousand, two hundred twenty".