2101201221111 has 64 divisors (see below), whose sum is σ = 2954201800704. Its totient is φ = 1326910636800.

The previous prime is 2101201221101. The next prime is 2101201221137. The reversal of 2101201221111 is 1111221021012.

It is a happy number.

It is not a de Polignac number, because 2101201221111 - 2¹¹ = 2101201219063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101201221101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 749624436 + ... + 749627238.

It is an arithmetic number, because the mean of its divisors is an integer number (46159403136).

Almost surely, 2^{2101201221111} is an apocalyptic number.

2101201221111 is a deficient number, since it is larger than the sum of its proper divisors (853000579593).

2101201221111 is a wasteful number, since it uses less digits than its factorization.

2101201221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684.

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

Adding to 2101201221111 its reverse (1111221021012), we get a palindrome (3212422242123).

The spelling of 2101201221111 in words is "two trillion, one hundred one billion, two hundred one million, two hundred twenty-one thousand, one hundred eleven".