110101121221 has 16 divisors (see below), whose sum is σ = 135524890368. Its totient is φ = 87102806400.

The previous prime is 110101121219. The next prime is 110101121287. The reversal of 110101121221 is 122121101011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 110101121221 - 2¹ = 110101121219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110101121621) 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, 767616 + ... + 899686.

It is an arithmetic number, because the mean of its divisors is an integer number (8470305648).

Almost surely, 2^110101121221 is an apocalyptic number.

It is an amenable number.

110101121221 is a deficient number, since it is larger than the sum of its proper divisors (25423769147).

110101121221 is a wasteful number, since it uses less digits than its factorization.

110101121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141252.

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

Adding to 110101121221 its reverse (122121101011), we get a palindrome (232222222232).

The spelling of 110101121221 in words is "one hundred ten billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-one".