2121101022011 has 4 divisors (see below), whose sum is σ = 2121104988000. Its totient is φ = 2121097056024.

The previous prime is 2121101021989. The next prime is 2121101022109. The reversal of 2121101022011 is 1102201011212.

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-2121101022011 is a prime.

It is a super-2 number, since 2×2121101022011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121101222011) 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, 1027196 + ... + 2301593.

It is an arithmetic number, because the mean of its divisors is an integer number (530276247000).

Almost surely, 2^{2121101022011} is an apocalyptic number.

2121101022011 is a deficient number, since it is larger than the sum of its proper divisors (3965989).

2121101022011 is an equidigital number, since it uses as much as digits as its factorization.

2121101022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965988.

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

Adding to 2121101022011 its reverse (1102201011212), we get a palindrome (3223302033223).

The spelling of 2121101022011 in words is "two trillion, one hundred twenty-one billion, one hundred one million, twenty-two thousand, eleven".