2121221202011 has 16 divisors (see below), whose sum is σ = 2169142934400. Its totient is φ = 2073719366208.

The previous prime is 2121221201999. The next prime is 2121221202053. The reversal of 2121221202011 is 1102021221212.

It is a cyclic number.

It is not a de Polignac number, because 2121221202011 - 2³⁰ = 2120147460187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121221202071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11736335 + ... + 11915703.

It is an arithmetic number, because the mean of its divisors is an integer number (135571433400).

Almost surely, 2^{2121221202011} is an apocalyptic number.

2121221202011 is a deficient number, since it is larger than the sum of its proper divisors (47921732389).

2121221202011 is a wasteful number, since it uses less digits than its factorization.

2121221202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180538.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121221202011 its reverse (1102021221212), we get a palindrome (3223242423223).

It can be divided in two parts, 2121221 and 202011, that added together give a palindrome (2323232).

The spelling of 2121221202011 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred two thousand, eleven".