20001222221194 has 16 divisors (see below), whose sum is σ = 30339372000960. Its totient is φ = 9888101476000.

The previous prime is 20001222221191. The next prime is 20001222221231. The reversal of 20001222221194 is 49112222210002.

It is not an unprimeable number, because it can be changed into a prime (20001222221191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12083067 + ... + 13638289.

It is an arithmetic number, because the mean of its divisors is an integer number (1896210750060).

Almost surely, 2^{20001222221194} is an apocalyptic number.

20001222221194 is a deficient number, since it is larger than the sum of its proper divisors (10338149779766).

20001222221194 is a wasteful number, since it uses less digits than its factorization.

20001222221194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627565.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 20001222221194 its reverse (49112222210002), we get a palindrome (69113444431196).

The spelling of 20001222221194 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred ninety-four".