2213121301331 has 4 divisors (see below), whose sum is σ = 2249401978464. Its totient is φ = 2176840624200.

The previous prime is 2213121301249. The next prime is 2213121301381. The reversal of 2213121301331 is 1331031213122.

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

It is a cyclic number.

It is not a de Polignac number, because 2213121301331 - 2¹⁸ = 2213121039187 is a prime.

It is a super-2 number, since 2×2213121301331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213121301297 and 2213121301306.

It is not an unprimeable number, because it can be changed into a prime (2213121301381) 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, 18140338475 + ... + 18140338596.

It is an arithmetic number, because the mean of its divisors is an integer number (562350494616).

Almost surely, 2^{2213121301331} is an apocalyptic number.

2213121301331 is a deficient number, since it is larger than the sum of its proper divisors (36280677133).

2213121301331 is an equidigital number, since it uses as much as digits as its factorization.

2213121301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36280677132.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2213121301331 its reverse (1331031213122), we get a palindrome (3544152514453).

The spelling of 2213121301331 in words is "two trillion, two hundred thirteen billion, one hundred twenty-one million, three hundred one thousand, three hundred thirty-one".