101111101222221 has 32 divisors (see below), whose sum is σ = 150386922967680. Its totient is φ = 67140854408448.

The previous prime is 101111101222207. The next prime is 101111101222277. The reversal of 101111101222221 is 122222101111101.

It is a happy number.

101111101222221 is a `hidden beast` number, since 1 + 0 + 111 + 110 + 1 + 222 + 221 = 666.

It is not a de Polignac number, because 101111101222221 - 2⁷ = 101111101222093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101111101222194 and 101111101222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111101222321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19333330 + ... + 23999996.

It is an arithmetic number, because the mean of its divisors is an integer number (4699591342740).

Almost surely, 2^{101111101222221} is an apocalyptic number.

It is an amenable number.

101111101222221 is a deficient number, since it is larger than the sum of its proper divisors (49275821745459).

101111101222221 is a wasteful number, since it uses less digits than its factorization.

101111101222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4669850 (or 4669844 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 101111101222221 its reverse (122222101111101), we get a palindrome (223333202333322).

The spelling of 101111101222221 in words is "one hundred one trillion, one hundred eleven billion, one hundred one million, two hundred twenty-two thousand, two hundred twenty-one".