2121011201111 has 6 divisors (see below), whose sum is σ = 2331359419536. Its totient is φ = 1928192000900.

The previous prime is 2121011201017. The next prime is 2121011201167. The reversal of 2121011201111 is 1111021101212.

It is a de Polignac number, because none of the positive numbers 2^k-2121011201111 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 (2121011201191) 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 5 ways as a sum of consecutive naturals, for example, 8764508975 + ... + 8764509216.

It is an arithmetic number, because the mean of its divisors is an integer number (388559903256).

Almost surely, 2^{2121011201111} is an apocalyptic number.

2121011201111 is a deficient number, since it is larger than the sum of its proper divisors (210348218425).

2121011201111 is a wasteful number, since it uses less digits than its factorization.

2121011201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529018213 (or 17529018202 counting only the distinct ones).

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

Adding to 2121011201111 its reverse (1111021101212), we get a palindrome (3232032302323).

The spelling of 2121011201111 in words is "two trillion, one hundred twenty-one billion, eleven million, two hundred one thousand, one hundred eleven".