400121002 has 8 divisors (see below), whose sum is σ = 600415200. Its totient is φ = 199982604.

The previous prime is 400120991. The next prime is 400121003. The reversal of 400121002 is 200121004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 400121002.

It is not an unprimeable number, because it can be changed into a prime (400121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32302 + ... + 42937.

It is an arithmetic number, because the mean of its divisors is an integer number (75051900).

Almost surely, 2^400121002 is an apocalyptic number.

400121002 is a deficient number, since it is larger than the sum of its proper divisors (200294198).

400121002 is a wasteful number, since it uses less digits than its factorization.

400121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77900.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 400121002 is about 20003.0248212614. The cubic root of 400121002 is about 736.8805881009.

Adding to 400121002 its reverse (200121004), we get a palindrome (600242006).

It can be divided in two parts, 40012 and 1002, that added together give a palindrome (41014).

The spelling of 400121002 in words is "four hundred million, one hundred twenty-one thousand, two".