400121220202 has 32 divisors (see below), whose sum is σ = 663858115200. Its totient is φ = 179357713920.

The previous prime is 400121220151. The next prime is 400121220211. The reversal of 400121220202 is 202022121004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90318 + ... + 899110.

It is an arithmetic number, because the mean of its divisors is an integer number (20745566100).

Almost surely, 2^400121220202 is an apocalyptic number.

400121220202 is a deficient number, since it is larger than the sum of its proper divisors (263736894998).

400121220202 is a wasteful number, since it uses less digits than its factorization.

400121220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809118.

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

Adding to 400121220202 its reverse (202022121004), we get a palindrome (602143341206).

The spelling of 400121220202 in words is "four hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred two".