2001220122 has 32 divisors (see below), whose sum is σ = 4371516864. Its totient is φ = 605705600.

The previous prime is 2001220103. The next prime is 2001220141. The reversal of 2001220122 is 2210221002.

It is an interprime number because it is at equal distance from previous prime (2001220103) and next prime (2001220141).

It is a junction number, because it is equal to n+sod(n) for n = 2001220098 and 2001220107.

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, 38872 + ... + 74252.

It is an arithmetic number, because the mean of its divisors is an integer number (136609902).

Almost surely, 2^2001220122 is an apocalyptic number.

2001220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001220122 is an abundant number, since it is smaller than the sum of its proper divisors (2370296742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001220122 is a wasteful number, since it uses less digits than its factorization.

2001220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36254.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2001220122 is about 44734.9988487761. The cubic root of 2001220122 is about 1260.1772073766.

Adding to 2001220122 its reverse (2210221002), we get a palindrome (4211441124).

The spelling of 2001220122 in words is "two billion, one million, two hundred twenty thousand, one hundred twenty-two".