2102210111221 has 8 divisors (see below), whose sum is σ = 2293332953184. Its totient is φ = 1911089407920.

The previous prime is 2102210111203. The next prime is 2102210111233. The reversal of 2102210111221 is 1221110122012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102210111221 - 2¹¹ = 2102210109173 is a prime.

It is a super-2 number, since 2×2102210111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102210111195 and 2102210111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102210111021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2074035 + ... + 2916511.

It is an arithmetic number, because the mean of its divisors is an integer number (286666619148).

Almost surely, 2^{2102210111221} is an apocalyptic number.

It is an amenable number.

2102210111221 is a deficient number, since it is larger than the sum of its proper divisors (191122841963).

2102210111221 is a wasteful number, since it uses less digits than its factorization.

2102210111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069331.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2102210111221 its reverse (1221110122012), we get a palindrome (3323320233233).

The spelling of 2102210111221 in words is "two trillion, one hundred two billion, two hundred ten million, one hundred eleven thousand, two hundred twenty-one".