2001101221210 has 32 divisors (see below), whose sum is σ = 4433208861312. Its totient is φ = 633315551040.

The previous prime is 2001101221159. The next prime is 2001101221211. The reversal of 2001101221210 is 121221011002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (2001101221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099505256 + ... + 1099507075.

It is an arithmetic number, because the mean of its divisors is an integer number (138537776916).

Almost surely, 2^{2001101221210} is an apocalyptic number.

2001101221210 is an abundant number, since it is smaller than the sum of its proper divisors (2432107640102).

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

2001101221210 is a wasteful number, since it uses less digits than its factorization.

2001101221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199012358.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001101221210 its reverse (121221011002), we get a palindrome (2122322232212).

The spelling of 2001101221210 in words is "two trillion, one billion, one hundred one million, two hundred twenty-one thousand, two hundred ten".