2001022221194 has 16 divisors (see below), whose sum is σ = 3182270364936. Its totient is φ = 940420108800.

The previous prime is 2001022221193. The next prime is 2001022221203. The reversal of 2001022221194 is 4911222201002.

It can be written as a sum of positive squares in 4 ways, for example, as 1458865387225 + 542156833969 = 1207835^2 + 736313^2 .

It is not an unprimeable number, because it can be changed into a prime (2001022221193) 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, 38642717 + ... + 38694464.

Almost surely, 2^{2001022221194} is an apocalyptic number.

2001022221194 is a deficient number, since it is larger than the sum of its proper divisors (1181248143742).

2001022221194 is a wasteful number, since it uses less digits than its factorization.

2001022221194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77337961.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 2001022221194 its reverse (4911222201002), we get a palindrome (6912244422196).

The spelling of 2001022221194 in words is "two trillion, one billion, twenty-two million, two hundred twenty-one thousand, one hundred ninety-four".