221213011131331 has 4 divisors (see below), whose sum is σ = 221213244044464. Its totient is φ = 221212778218200.

The previous prime is 221213011131319. The next prime is 221213011131379. The reversal of 221213011131331 is 133131110312122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221213011131331 is a prime.

It is a super-2 number, since 2×221213011131331² (a number of 29 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 = 221213011131296 and 221213011131305.

It is not an unprimeable number, because it can be changed into a prime (221213011131631) 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, 115026060 + ... + 116933401.

It is an arithmetic number, because the mean of its divisors is an integer number (55303311011116).

Almost surely, 2^{221213011131331} is an apocalyptic number.

221213011131331 is a deficient number, since it is larger than the sum of its proper divisors (232913133).

221213011131331 is an equidigital number, since it uses as much as digits as its factorization.

221213011131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232913132.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 221213011131331 its reverse (133131110312122), we get a palindrome (354344121443453).

The spelling of 221213011131331 in words is "two hundred twenty-one trillion, two hundred thirteen billion, eleven million, one hundred thirty-one thousand, three hundred thirty-one".