101220212111 has 2 divisors, whose sum is σ = 101220212112. Its totient is φ = 101220212110.

The previous prime is 101220212087. The next prime is 101220212143. The reversal of 101220212111 is 111212022101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101220212111 - 2⁶ = 101220212047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220212311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610106055 + 50610106056.

It is an arithmetic number, because the mean of its divisors is an integer number (50610106056).

Almost surely, 2^101220212111 is an apocalyptic number.

101220212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220212111 is an equidigital number, since it uses as much as digits as its factorization.

101220212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101220212111 its reverse (111212022101), we get a palindrome (212432234212).

The spelling of 101220212111 in words is "one hundred one billion, two hundred twenty million, two hundred twelve thousand, one hundred eleven".