2111010101221 has 8 divisors (see below), whose sum is σ = 2412597434240. Its totient is φ = 1809426383568.

The previous prime is 2111010101201. The next prime is 2111010101251. The reversal of 2111010101221 is 1221010101112.

It is a happy number.

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 2111010101221 - 2⁷ = 2111010101093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111010101201) 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, 490855 + ... + 2112571.

It is an arithmetic number, because the mean of its divisors is an integer number (301574679280).

Almost surely, 2^{2111010101221} is an apocalyptic number.

It is an amenable number.

2111010101221 is a deficient number, since it is larger than the sum of its proper divisors (301587333019).

2111010101221 is a wasteful number, since it uses less digits than its factorization.

2111010101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807683.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111010101221 its reverse (1221010101112), we get a palindrome (3332020202333).

The spelling of 2111010101221 in words is "two trillion, one hundred eleven billion, ten million, one hundred one thousand, two hundred twenty-one".