2120211321309 has 6 divisors (see below), whose sum is σ = 3062527464126. Its totient is φ = 1413474214200.

The previous prime is 2120211321301. The next prime is 2120211321359. The reversal of 2120211321309 is 9031231120212.

2120211321309 is a `hidden beast` number, since 2 + 1 + 20 + 2 + 11 + 321 + 309 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2081686268025 + 38525053284 = 1442805^2 + 196278^2 .

It is not a de Polignac number, because 2120211321309 - 2³ = 2120211321301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211321301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117789517842 + ... + 117789517859.

It is an arithmetic number, because the mean of its divisors is an integer number (510421244021).

Almost surely, 2^{2120211321309} is an apocalyptic number.

It is an amenable number.

2120211321309 is a deficient number, since it is larger than the sum of its proper divisors (942316142817).

2120211321309 is a wasteful number, since it uses less digits than its factorization.

2120211321309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235579035707 (or 235579035704 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 2120211321309 in words is "two trillion, one hundred twenty billion, two hundred eleven million, three hundred twenty-one thousand, three hundred nine".