2100121211111 has 8 divisors (see below), whose sum is σ = 2618332938624. Its totient is φ = 1636458086520.

The previous prime is 2100121211087. The next prime is 2100121211233. The reversal of 2100121211111 is 1111121210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100121211111 - 2²² = 2100117016807 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 (2100121201111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13637150645 + ... + 13637150798.

It is an arithmetic number, because the mean of its divisors is an integer number (327291617328).

Almost surely, 2^{2100121211111} is an apocalyptic number.

2100121211111 is a deficient number, since it is larger than the sum of its proper divisors (518211727513).

2100121211111 is a wasteful number, since it uses less digits than its factorization.

2100121211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27274301461.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2100121211111 its reverse (1111121210012), we get a palindrome (3211242421123).

The spelling of 2100121211111 in words is "two trillion, one hundred billion, one hundred twenty-one million, two hundred eleven thousand, one hundred eleven".