2101201212111 has 16 divisors (see below), whose sum is σ = 2808658310400. Its totient is φ = 1397274278400.

The previous prime is 2101201212109. The next prime is 2101201212157. The reversal of 2101201212111 is 1112121021012.

It is a happy number.

It is not a de Polignac number, because 2101201212111 - 2¹ = 2101201212109 is a prime.

It is a super-2 number, since 2×2101201212111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101201212181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4439436 + ... + 4889886.

It is an arithmetic number, because the mean of its divisors is an integer number (175541144400).

Almost surely, 2^{2101201212111} is an apocalyptic number.

2101201212111 is a deficient number, since it is larger than the sum of its proper divisors (707457098289).

2101201212111 is a wasteful number, since it uses less digits than its factorization.

2101201212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454366.

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

Adding to 2101201212111 its reverse (1112121021012), we get a palindrome (3213322233123).

The spelling of 2101201212111 in words is "two trillion, one hundred one billion, two hundred one million, two hundred twelve thousand, one hundred eleven".