2010110111221 has 4 divisors (see below), whose sum is σ = 2010119111244. Its totient is φ = 2010101111200.

The previous prime is 2010110111167. The next prime is 2010110111257. The reversal of 2010110111221 is 1221110110102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1473040988721 + 537069122500 = 1213689^2 + 732850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010110111221 - 2³⁵ = 1975750372853 is a prime.

It is a super-2 number, since 2×2010110111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010110111521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4156240 + ... + 4614601.

It is an arithmetic number, because the mean of its divisors is an integer number (502529777811).

Almost surely, 2^{2010110111221} is an apocalyptic number.

It is an amenable number.

2010110111221 is a deficient number, since it is larger than the sum of its proper divisors (9000023).

2010110111221 is an equidigital number, since it uses as much as digits as its factorization.

2010110111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000022.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2010110111221 its reverse (1221110110102), we get a palindrome (3231220221323).

The spelling of 2010110111221 in words is "two trillion, ten billion, one hundred ten million, one hundred eleven thousand, two hundred twenty-one".