2101221202110 has 64 divisors (see below), whose sum is σ = 5321314621440. Its totient is φ = 529941589760.

The previous prime is 2101221202057. The next prime is 2101221202117. The reversal of 2101221202110 is 112021221012.

It is a super-3 number, since 3×2101221202110³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2101221202110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101221202117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17046726 + ... + 17169545.

It is an arithmetic number, because the mean of its divisors is an integer number (83145540960).

Almost surely, 2^{2101221202110} is an apocalyptic number.

2101221202110 is an abundant number, since it is smaller than the sum of its proper divisors (3220093419330).

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

2101221202110 is a wasteful number, since it uses less digits than its factorization.

2101221202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34216393.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2101221202110 its reverse (112021221012), we get a palindrome (2213242423122).

The spelling of 2101221202110 in words is "two trillion, one hundred one billion, two hundred twenty-one million, two hundred two thousand, one hundred ten".