2011211101221 has 8 divisors (see below), whose sum is σ = 3064702630464. Its totient is φ = 1149263486400.

The previous prime is 2011211101201. The next prime is 2011211101241. The reversal of 2011211101221 is 1221011121102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2011211101201) and next prime (2011211101241).

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

It is not a de Polignac number, because 2011211101221 - 2¹⁵ = 2011211068453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011211101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011211101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47885978580 + ... + 47885978621.

It is an arithmetic number, because the mean of its divisors is an integer number (383087828808).

Almost surely, 2^{2011211101221} is an apocalyptic number.

2011211101221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2011211101221 is a deficient number, since it is larger than the sum of its proper divisors (1053491529243).

2011211101221 is an equidigital number, since it uses as much as digits as its factorization.

2011211101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95771957211.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2011211101221 its reverse (1221011121102), we get a palindrome (3232222222323).

The spelling of 2011211101221 in words is "two trillion, eleven billion, two hundred eleven million, one hundred one thousand, two hundred twenty-one".