101221331111 has 2 divisors, whose sum is σ = 101221331112. Its totient is φ = 101221331110.

The previous prime is 101221331093. The next prime is 101221331117. The reversal of 101221331111 is 111133122101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101221331111 - 2³⁴ = 84041461927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221331111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221331117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610665555 + 50610665556.

It is an arithmetic number, because the mean of its divisors is an integer number (50610665556).

Almost surely, 2^101221331111 is an apocalyptic number.

101221331111 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221331111 is an equidigital number, since it uses as much as digits as its factorization.

101221331111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 101221331111 its reverse (111133122101), we get a palindrome (212354453212).

The spelling of 101221331111 in words is "one hundred one billion, two hundred twenty-one million, three hundred thirty-one thousand, one hundred eleven".