2221131213211 has 2 divisors, whose sum is σ = 2221131213212. Its totient is φ = 2221131213210.

The previous prime is 2221131213139. The next prime is 2221131213269. The reversal of 2221131213211 is 1123121311222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221131213211 - 2¹¹ = 2221131211163 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221131213011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110565606605 + 1110565606606.

It is an arithmetic number, because the mean of its divisors is an integer number (1110565606606).

Almost surely, 2^{2221131213211} is an apocalyptic number.

2221131213211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221131213211 is an equidigital number, since it uses as much as digits as its factorization.

2221131213211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

Adding to 2221131213211 its reverse (1123121311222), we get a palindrome (3344252524433).

It can be divided in two parts, 2221131 and 213211, that added together give a palindrome (2434342).

The spelling of 2221131213211 in words is "two trillion, two hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred eleven".