2001221022010 has 64 divisors (see below), whose sum is σ = 4155358521600. Its totient is φ = 679708495872.

The previous prime is 2001221021977. The next prime is 2001221022023. The reversal of 2001221022010 is 102201221002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45399361 + ... + 45443419.

It is an arithmetic number, because the mean of its divisors is an integer number (64927476900).

Almost surely, 2^{2001221022010} is an apocalyptic number.

2001221022010 is an abundant number, since it is smaller than the sum of its proper divisors (2154137499590).

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

2001221022010 is a wasteful number, since it uses less digits than its factorization.

2001221022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50135.

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

Adding to 2001221022010 its reverse (102201221002), we get a palindrome (2103422243012).

The spelling of 2001221022010 in words is "two trillion, one billion, two hundred twenty-one million, twenty-two thousand, ten".