2101210102221 has 8 divisors (see below), whose sum is σ = 2810564312640. Its totient is φ = 1396331313312.

The previous prime is 2101210102219. The next prime is 2101210102223. The reversal of 2101210102221 is 1222010121012.

It is an interprime number because it is at equal distance from previous prime (2101210102219) and next prime (2101210102223).

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

It is not a de Polignac number, because 2101210102221 - 2¹ = 2101210102219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101210102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101210102223) 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, 1118854281 + ... + 1118856158.

It is an arithmetic number, because the mean of its divisors is an integer number (351320539080).

Almost surely, 2^{2101210102221} is an apocalyptic number.

It is an amenable number.

2101210102221 is a deficient number, since it is larger than the sum of its proper divisors (709354210419).

2101210102221 is a wasteful number, since it uses less digits than its factorization.

2101210102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237710755.

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

Adding to 2101210102221 its reverse (1222010121012), we get a palindrome (3323220223233).

The spelling of 2101210102221 in words is "two trillion, one hundred one billion, two hundred ten million, one hundred two thousand, two hundred twenty-one".