2111212010101 has 4 divisors (see below), whose sum is σ = 2111215387104. Its totient is φ = 2111208633100.

The previous prime is 2111212010087. The next prime is 2111212010111. The reversal of 2111212010101 is 1010102121112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111212010101 - 2⁵ = 2111212010069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111212010111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445945 + ... + 2102686.

It is an arithmetic number, because the mean of its divisors is an integer number (527803846776).

Almost surely, 2^{2111212010101} is an apocalyptic number.

It is an amenable number.

2111212010101 is a deficient number, since it is larger than the sum of its proper divisors (3377003).

2111212010101 is an equidigital number, since it uses as much as digits as its factorization.

2111212010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377002.

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

Adding to 2111212010101 its reverse (1010102121112), we get a palindrome (3121314131213).

It can be divided in two parts, 211121 and 2010101, that added together give a palindrome (2221222).

The spelling of 2111212010101 in words is "two trillion, one hundred eleven billion, two hundred twelve million, ten thousand, one hundred one".