400400220202 has 4 divisors (see below), whose sum is σ = 600600330306. Its totient is φ = 200200110100.

The previous prime is 400400220169. The next prime is 400400220239. The reversal of 400400220202 is 202022004004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 335598917481 + 64801302721 = 579309^2 + 254561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100055049 + ... + 100100055052.

Almost surely, 2^400400220202 is an apocalyptic number.

400400220202 is a deficient number, since it is larger than the sum of its proper divisors (200200110104).

400400220202 is a wasteful number, since it uses less digits than its factorization.

400400220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200200110103.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 400400220202 its reverse (202022004004), we get a palindrome (602422224206).

It can be divided in two parts, 4004002 and 20202, that added together give a palindrome (4024204).

The spelling of 400400220202 in words is "four hundred billion, four hundred million, two hundred twenty thousand, two hundred two".