101221122111 has 16 divisors (see below), whose sum is σ = 139491988704. Its totient is φ = 65238735744.

The previous prime is 101221122089. The next prime is 101221122127. The reversal of 101221122111 is 111221122101.

It is a happy number.

It is not a de Polignac number, because 101221122111 - 2¹⁰ = 101221121087 is a prime.

It is a super-2 number, since 2×101221122111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221122311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2886720 + ... + 2921573.

It is an arithmetic number, because the mean of its divisors is an integer number (8718249294).

Almost surely, 2^101221122111 is an apocalyptic number.

101221122111 is a deficient number, since it is larger than the sum of its proper divisors (38270866593).

101221122111 is a wasteful number, since it uses less digits than its factorization.

101221122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808490.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101221122111 its reverse (111221122101), we get a palindrome (212442244212).

The spelling of 101221122111 in words is "one hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".