101210221111 has 2 divisors, whose sum is σ = 101210221112. Its totient is φ = 101210221110.

The previous prime is 101210221019. The next prime is 101210221127. The reversal of 101210221111 is 111122012101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101210221111 - 2⁹ = 101210220599 is a prime.

It is a super-4 number, since 4×101210221111⁴ (a number of 45 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101210221091 and 101210221100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101210224111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605110555 + 50605110556.

It is an arithmetic number, because the mean of its divisors is an integer number (50605110556).

Almost surely, 2^101210221111 is an apocalyptic number.

101210221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210221111 is an equidigital number, since it uses as much as digits as its factorization.

101210221111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101210221111 its reverse (111122012101), we get a palindrome (212332233212).

The spelling of 101210221111 in words is "one hundred one billion, two hundred ten million, two hundred twenty-one thousand, one hundred eleven".