2101210011221 has 8 divisors (see below), whose sum is σ = 2104288243200. Its totient is φ = 2098132010800.

The previous prime is 2101210011179. The next prime is 2101210011227. The reversal of 2101210011221 is 1221100121012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101210011221 - 2¹⁴ = 2101209994837 is a prime.

It is a super-2 number, since 2×2101210011221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101210011196 and 2101210011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101210011227) 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, 27889520 + ... + 27964758.

It is an arithmetic number, because the mean of its divisors is an integer number (263036030400).

Almost surely, 2^{2101210011221} is an apocalyptic number.

It is an amenable number.

2101210011221 is a deficient number, since it is larger than the sum of its proper divisors (3078231979).

2101210011221 is an equidigital number, since it uses as much as digits as its factorization.

2101210011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115779.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101210011221 its reverse (1221100121012), we get a palindrome (3322310132233).

The spelling of 2101210011221 in words is "two trillion, one hundred one billion, two hundred ten million, eleven thousand, two hundred twenty-one".