2121012210011 has 4 divisors (see below), whose sum is σ = 2122099353024. Its totient is φ = 2119925067000.

The previous prime is 2121012209999. The next prime is 2121012210049. The reversal of 2121012210011 is 1100122101212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012210011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121012210311) 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, 543568580 + ... + 543572481.

It is an arithmetic number, because the mean of its divisors is an integer number (530524838256).

Almost surely, 2^{2121012210011} is an apocalyptic number.

2121012210011 is a deficient number, since it is larger than the sum of its proper divisors (1087143013).

2121012210011 is a wasteful number, since it uses less digits than its factorization.

2121012210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087143012.

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

Adding to 2121012210011 its reverse (1100122101212), we get a palindrome (3221134311223).

The spelling of 2121012210011 in words is "two trillion, one hundred twenty-one billion, twelve million, two hundred ten thousand, eleven".