1220211122231 has 2 divisors, whose sum is σ = 1220211122232. Its totient is φ = 1220211122230.

The previous prime is 1220211122227. The next prime is 1220211122233. The reversal of 1220211122231 is 1322211120221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220211122231 - 2² = 1220211122227 is a prime.

It is a super-2 number, since 2×1220211122231² (a number of 25 digits) contains 22 as substring.

Together with 1220211122233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220211122233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610105561115 + 610105561116.

It is an arithmetic number, because the mean of its divisors is an integer number (610105561116).

Almost surely, 2^{1220211122231} is an apocalyptic number.

1220211122231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220211122231 is an equidigital number, since it uses as much as digits as its factorization.

1220211122231 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 1220211122231 its reverse (1322211120221), we get a palindrome (2542422242452).

The spelling of 1220211122231 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-two thousand, two hundred thirty-one".