20120111221101 has 16 divisors (see below), whose sum is σ = 26849633371200. Its totient is φ = 13401999836288.

The previous prime is 20120111221087. The next prime is 20120111221103. The reversal of 20120111221101 is 10112211102102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20120111221101 - 2⁷ = 20120111220973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120111221103) 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, 53474890 + ... + 53849828.

It is an arithmetic number, because the mean of its divisors is an integer number (1678102085700).

Almost surely, 2^{20120111221101} is an apocalyptic number.

It is an amenable number.

20120111221101 is a deficient number, since it is larger than the sum of its proper divisors (6729522150099).

20120111221101 is a wasteful number, since it uses less digits than its factorization.

20120111221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390108.

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

Adding to 20120111221101 its reverse (10112211102102), we get a palindrome (30232322323203).

The spelling of 20120111221101 in words is "twenty trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, one hundred one".