2102101211221 has 8 divisors (see below), whose sum is σ = 2367175557888. Its totient is φ = 1849355904000.

The previous prime is 2102101211201. The next prime is 2102101211239. The reversal of 2102101211221 is 1221121012012.

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

It is not a de Polignac number, because 2102101211221 - 2¹³ = 2102101203029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102101211195 and 2102101211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102101211201) 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, 3082259500 + ... + 3082260181.

It is an arithmetic number, because the mean of its divisors is an integer number (295896944736).

Almost surely, 2^{2102101211221} is an apocalyptic number.

It is an amenable number.

2102101211221 is a deficient number, since it is larger than the sum of its proper divisors (265074346667).

2102101211221 is a wasteful number, since it uses less digits than its factorization.

2102101211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164519723.

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

Adding to 2102101211221 its reverse (1221121012012), we get a palindrome (3323222223233).

The spelling of 2102101211221 in words is "two trillion, one hundred two billion, one hundred one million, two hundred eleven thousand, two hundred twenty-one".