2120011202221 has 16 divisors (see below), whose sum is σ = 2434536599040. Its totient is φ = 1825791487920.

The previous prime is 2120011202191. The next prime is 2120011202233. The reversal of 2120011202221 is 1222021100212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2120011202221 - 2²¹ = 2120009105069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120011202195 and 2120011202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120011202261) 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, 7694386 + ... + 7965148.

It is an arithmetic number, because the mean of its divisors is an integer number (152158537440).

Almost surely, 2^{2120011202221} is an apocalyptic number.

It is an amenable number.

2120011202221 is a deficient number, since it is larger than the sum of its proper divisors (314525396819).

2120011202221 is a wasteful number, since it uses less digits than its factorization.

2120011202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308256.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2120011202221 its reverse (1222021100212), we get a palindrome (3342032302433).

It can be divided in two parts, 2120011 and 202221, that added together give a palindrome (2322232).

The spelling of 2120011202221 in words is "two trillion, one hundred twenty billion, eleven million, two hundred two thousand, two hundred twenty-one".