2101211201221 has 8 divisors (see below), whose sum is σ = 2366173317888. Its totient is φ = 1848572904000.

The previous prime is 2101211201191. The next prime is 2101211201263. The reversal of 2101211201221 is 1221021121012.

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

It is not a de Polignac number, because 2101211201221 - 2²³ = 2101202812613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101211201195 and 2101211201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101211202221) 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, 3080954500 + ... + 3080955181.

It is an arithmetic number, because the mean of its divisors is an integer number (295771664736).

Almost surely, 2^{2101211201221} is an apocalyptic number.

It is an amenable number.

2101211201221 is a deficient number, since it is larger than the sum of its proper divisors (264962116667).

2101211201221 is a wasteful number, since it uses less digits than its factorization.

2101211201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6161909723.

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

Adding to 2101211201221 its reverse (1221021121012), we get a palindrome (3322232322233).

The spelling of 2101211201221 in words is "two trillion, one hundred one billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".