2001220021010 has 32 divisors (see below), whose sum is σ = 4148221410432. Its totient is φ = 680894922240.

The previous prime is 2001220020949. The next prime is 2001220021103. The reversal of 2001220021010 is 101200221002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220020982 and 2001220021000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109108607 + ... + 109126946.

It is an arithmetic number, because the mean of its divisors is an integer number (129631919076).

Almost surely, 2^{2001220021010} is an apocalyptic number.

2001220021010 is an abundant number, since it is smaller than the sum of its proper divisors (2147001389422).

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

2001220021010 is a wasteful number, since it uses less digits than its factorization.

2001220021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218235698.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2001220021010 its reverse (101200221002), we get a palindrome (2102420242012).

The spelling of 2001220021010 in words is "two trillion, one billion, two hundred twenty million, twenty-one thousand, ten".