1100120101221 has 16 divisors (see below), whose sum is σ = 1557692187840. Its totient is φ = 688663906560.

The previous prime is 1100120101219. The next prime is 1100120101247. The reversal of 1100120101221 is 1221010210011.

It is not a de Polignac number, because 1100120101221 - 2¹ = 1100120101219 is a prime.

It is a super-2 number, since 2×1100120101221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1100120101197 and 1100120101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100120101321) 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, 85393350 + ... + 85406231.

It is an arithmetic number, because the mean of its divisors is an integer number (97355761740).

Almost surely, 2^{1100120101221} is an apocalyptic number.

It is an amenable number.

1100120101221 is a deficient number, since it is larger than the sum of its proper divisors (457572086619).

1100120101221 is a wasteful number, since it uses less digits than its factorization.

1100120101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170799716.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1100120101221 its reverse (1221010210011), we get a palindrome (2321130311232).

The spelling of 1100120101221 in words is "one trillion, one hundred billion, one hundred twenty million, one hundred one thousand, two hundred twenty-one".