2221211021231 has 2 divisors, whose sum is σ = 2221211021232. Its totient is φ = 2221211021230.

The previous prime is 2221211021179. The next prime is 2221211021251. The reversal of 2221211021231 is 1321201121222.

It is an a-pointer prime, because the next prime (2221211021251) can be obtained adding 2221211021231 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221211021231 is a prime.

It is a super-2 number, since 2×2221211021231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221211021251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110605510615 + 1110605510616.

It is an arithmetic number, because the mean of its divisors is an integer number (1110605510616).

Almost surely, 2^{2221211021231} is an apocalyptic number.

2221211021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221211021231 is an equidigital number, since it uses as much as digits as its factorization.

2221211021231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2221211021231 its reverse (1321201121222), we get a palindrome (3542412142453).

Subtracting from 2221211021231 its reverse (1321201121222), we obtain a palindrome (900009900009).

The spelling of 2221211021231 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, twenty-one thousand, two hundred thirty-one".