2121002201111 has 4 divisors (see below), whose sum is σ = 2122461942552. Its totient is φ = 2119542459672.

The previous prime is 2121002201053. The next prime is 2121002201117. The reversal of 2121002201111 is 1111022001212.

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 2121002201111 - 2⁶ = 2121002201047 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 (2121002201117) 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, 729868541 + ... + 729871446.

It is an arithmetic number, because the mean of its divisors is an integer number (530615485638).

Almost surely, 2^{2121002201111} is an apocalyptic number.

2121002201111 is a deficient number, since it is larger than the sum of its proper divisors (1459741441).

2121002201111 is a wasteful number, since it uses less digits than its factorization.

2121002201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459741440.

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

Adding to 2121002201111 its reverse (1111022001212), we get a palindrome (3232024202323).

The spelling of 2121002201111 in words is "two trillion, one hundred twenty-one billion, two million, two hundred one thousand, one hundred eleven".