2011213121321 has 4 divisors (see below), whose sum is σ = 2011215970944. Its totient is φ = 2011210271700.

The previous prime is 2011213121317. The next prime is 2011213121377. The reversal of 2011213121321 is 1231213121102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2011213121321 - 2² = 2011213121317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011213121293 and 2011213121302.

It is not an unprimeable number, because it can be changed into a prime (2011213121311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506336 + ... + 2068526.

It is an arithmetic number, because the mean of its divisors is an integer number (502803992736).

Almost surely, 2^{2011213121321} is an apocalyptic number.

It is an amenable number.

2011213121321 is a deficient number, since it is larger than the sum of its proper divisors (2849623).

2011213121321 is a wasteful number, since it uses less digits than its factorization.

2011213121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849622.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2011213121321 its reverse (1231213121102), we get a palindrome (3242426242423).

The spelling of 2011213121321 in words is "two trillion, eleven billion, two hundred thirteen million, one hundred twenty-one thousand, three hundred twenty-one".