2001100220122 has 16 divisors (see below), whose sum is σ = 3074900896872. Its totient is φ = 976133882880.

The previous prime is 2001100220071. The next prime is 2001100220129. The reversal of 2001100220122 is 2210220011002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 249551201601 + 1751549018521 = 499551^2 + 1323461^2 .

It is not an unprimeable number, because it can be changed into a prime (2001100220129) 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, 11448778 + ... + 11622250.

Almost surely, 2^{2001100220122} is an apocalyptic number.

2001100220122 is a deficient number, since it is larger than the sum of its proper divisors (1073800676750).

2001100220122 is a wasteful number, since it uses less digits than its factorization.

2001100220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314193.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001100220122 its reverse (2210220011002), we get a palindrome (4211320231124).

It can be divided in two parts, 2001100 and 220122, that added together give a palindrome (2221222).

The spelling of 2001100220122 in words is "two trillion, one billion, one hundred million, two hundred twenty thousand, one hundred twenty-two".