101220611231 has 2 divisors, whose sum is σ = 101220611232. Its totient is φ = 101220611230.

The previous prime is 101220611201. The next prime is 101220611237. The reversal of 101220611231 is 132116022101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101220611231 - 2¹⁰ = 101220610207 is a prime.

It is a super-2 number, since 2×101220611231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220611237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610305615 + 50610305616.

It is an arithmetic number, because the mean of its divisors is an integer number (50610305616).

Almost surely, 2^101220611231 is an apocalyptic number.

101220611231 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220611231 is an equidigital number, since it uses as much as digits as its factorization.

101220611231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 101220611231 its reverse (132116022101), we get a palindrome (233336633332).

The spelling of 101220611231 in words is "one hundred one billion, two hundred twenty million, six hundred eleven thousand, two hundred thirty-one".