2121211021011 has 128 divisors (see below), whose sum is σ = 3140859359232. Its totient is φ = 1268047872000.

The previous prime is 2121211020997. The next prime is 2121211021019. The reversal of 2121211021011 is 1101201121212.

It is a happy number.

It is not a de Polignac number, because 2121211021011 - 2⁵ = 2121211020979 is a prime.

It is a super-3 number, since 3×2121211021011³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121211021019) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7827346806 + ... + 7827347076.

It is an arithmetic number, because the mean of its divisors is an integer number (24537963744).

Almost surely, 2^{2121211021011} is an apocalyptic number.

2121211021011 is a deficient number, since it is larger than the sum of its proper divisors (1019648338221).

2121211021011 is a wasteful number, since it uses less digits than its factorization.

2121211021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121211021011 its reverse (1101201121212), we get a palindrome (3222412142223).

The spelling of 2121211021011 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, eleven".