21202211201331 has 4 divisors (see below), whose sum is σ = 28269614935112. Its totient is φ = 14134807467552.

The previous prime is 21202211201267. The next prime is 21202211201359. The reversal of 21202211201331 is 13310211220212.

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

It is not a de Polignac number, because 21202211201331 - 2⁶ = 21202211201267 is a prime.

It is a super-2 number, since 2×21202211201331² (a number of 27 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 = 21202211201298 and 21202211201307.

It is not an unprimeable number, because it can be changed into a prime (21202211209331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533701866886 + ... + 3533701866891.

It is an arithmetic number, because the mean of its divisors is an integer number (7067403733778).

Almost surely, 2^{21202211201331} is an apocalyptic number.

21202211201331 is a deficient number, since it is larger than the sum of its proper divisors (7067403733781).

21202211201331 is an equidigital number, since it uses as much as digits as its factorization.

21202211201331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7067403733780.

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

Adding to 21202211201331 its reverse (13310211220212), we get a palindrome (34512422421543).

The spelling of 21202211201331 in words is "twenty-one trillion, two hundred two billion, two hundred eleven million, two hundred one thousand, three hundred thirty-one".