2111001212101 has 4 divisors (see below), whose sum is σ = 2124447079852. Its totient is φ = 2097555344352.

The previous prime is 2111001212053. The next prime is 2111001212143. The reversal of 2111001212101 is 1012121001112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 649015528225 + 1461985683876 = 805615^2 + 1209126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111001212101 - 2⁷ = 2111001211973 is a prime.

It is a super-2 number, since 2×2111001212101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111001212161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6722933640 + ... + 6722933953.

It is an arithmetic number, because the mean of its divisors is an integer number (531111769963).

Almost surely, 2^{2111001212101} is an apocalyptic number.

It is an amenable number.

2111001212101 is a deficient number, since it is larger than the sum of its proper divisors (13445867751).

2111001212101 is a wasteful number, since it uses less digits than its factorization.

2111001212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445867750.

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

Adding to 2111001212101 its reverse (1012121001112), we get a palindrome (3123122213213).

The spelling of 2111001212101 in words is "two trillion, one hundred eleven billion, one million, two hundred twelve thousand, one hundred one".