2100012121211 has 4 divisors (see below), whose sum is σ = 2101068998952. Its totient is φ = 2098955243472.

The previous prime is 2100012121189. The next prime is 2100012121219. The reversal of 2100012121211 is 1121212100012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100012121211 - 2⁶ = 2100012121147 is a prime.

It is a super-3 number, since 3×2100012121211³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100012121219) 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, 528435890 + ... + 528439863.

It is an arithmetic number, because the mean of its divisors is an integer number (525267249738).

Almost surely, 2^{2100012121211} is an apocalyptic number.

2100012121211 is a deficient number, since it is larger than the sum of its proper divisors (1056877741).

2100012121211 is a wasteful number, since it uses less digits than its factorization.

2100012121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056877740.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2100012121211 its reverse (1121212100012), we get a palindrome (3221224221223).

The spelling of 2100012121211 in words is "two trillion, one hundred billion, twelve million, one hundred twenty-one thousand, two hundred eleven".