2102210202221 has 8 divisors (see below), whose sum is σ = 2147571369984. Its totient is φ = 2056875421680.

The previous prime is 2102210202151. The next prime is 2102210202251. The reversal of 2102210202221 is 1222020122012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102210202221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102210202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102210202251) 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, 6435710 + ... + 6754463.

It is an arithmetic number, because the mean of its divisors is an integer number (268446421248).

Almost surely, 2^{2102210202221} is an apocalyptic number.

It is an amenable number.

2102210202221 is a deficient number, since it is larger than the sum of its proper divisors (45361167763).

2102210202221 is a wasteful number, since it uses less digits than its factorization.

2102210202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13193611.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2102210202221 its reverse (1222020122012), we get a palindrome (3324230324233).

The spelling of 2102210202221 in words is "two trillion, one hundred two billion, two hundred ten million, two hundred two thousand, two hundred twenty-one".