2001020122 has 16 divisors (see below), whose sum is σ = 3222856512. Its totient is φ = 928392640.

The previous prime is 2001020117. The next prime is 2001020137. The reversal of 2001020122 is 2210201002.

It is a junction number, because it is equal to n+sod(n) for n = 2001020099 and 2001020108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412048 + ... + 416875.

It is an arithmetic number, because the mean of its divisors is an integer number (201428532).

Almost surely, 2^2001020122 is an apocalyptic number.

2001020122 is a deficient number, since it is larger than the sum of its proper divisors (1221836390).

2001020122 is a wasteful number, since it uses less digits than its factorization.

2001020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829013.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2001020122 is about 44732.7634067023. The cubic root of 2001020122 is about 1260.1352256816.

Adding to 2001020122 its reverse (2210201002), we get a palindrome (4211221124).

The spelling of 2001020122 in words is "two billion, one million, twenty thousand, one hundred twenty-two".