2121232120311 has 4 divisors (see below), whose sum is σ = 2828309493752. Its totient is φ = 1414154746872.

The previous prime is 2121232120283. The next prime is 2121232120379. The reversal of 2121232120311 is 1130212321212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2121232120311 - 2¹³ = 2121232112119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121232120411) 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, 353538686716 + ... + 353538686721.

It is an arithmetic number, because the mean of its divisors is an integer number (707077373438).

Almost surely, 2^{2121232120311} is an apocalyptic number.

2121232120311 is a deficient number, since it is larger than the sum of its proper divisors (707077373441).

2121232120311 is an equidigital number, since it uses as much as digits as its factorization.

2121232120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707077373440.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2121232120311 its reverse (1130212321212), we get a palindrome (3251444441523).

The spelling of 2121232120311 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-two million, one hundred twenty thousand, three hundred eleven".