400031221022 has 4 divisors (see below), whose sum is σ = 600046831536. Its totient is φ = 200015610510.

The previous prime is 400031221019. The next prime is 400031221039. The reversal of 400031221022 is 220122130004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100007805254 + ... + 100007805257.

It is an arithmetic number, because the mean of its divisors is an integer number (150011707884).

Almost surely, 2^400031221022 is an apocalyptic number.

400031221022 is a deficient number, since it is larger than the sum of its proper divisors (200015610514).

400031221022 is a wasteful number, since it uses less digits than its factorization.

400031221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200015610513.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 400031221022 its reverse (220122130004), we get a palindrome (620153351026).

The spelling of 400031221022 in words is "four hundred billion, thirty-one million, two hundred twenty-one thousand, twenty-two".