1220202211231 has 2 divisors, whose sum is σ = 1220202211232. Its totient is φ = 1220202211230.

The previous prime is 1220202211093. The next prime is 1220202211381. The reversal of 1220202211231 is 1321122020221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220202211231 - 2⁹ = 1220202210719 is a prime.

It is a super-2 number, since 2×1220202211231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220202211199 and 1220202211208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220202217231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101105615 + 610101105616.

It is an arithmetic number, because the mean of its divisors is an integer number (610101105616).

Almost surely, 2^{1220202211231} is an apocalyptic number.

1220202211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220202211231 is an equidigital number, since it uses as much as digits as its factorization.

1220202211231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1220202211231 its reverse (1321122020221), we get a palindrome (2541324231452).

The spelling of 1220202211231 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred eleven thousand, two hundred thirty-one".