111220101022101 has 64 divisors (see below), whose sum is σ = 169762579430400. Its totient is φ = 64319798117376.

The previous prime is 111220101022081. The next prime is 111220101022111. The reversal of 111220101022101 is 101220101022111.

It is a happy number.

It is not a de Polignac number, because 111220101022101 - 2¹³ = 111220101013909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220101022111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 427345230 + ... + 427605408.

It is an arithmetic number, because the mean of its divisors is an integer number (2652540303600).

Almost surely, 2^{111220101022101} is an apocalyptic number.

It is an amenable number.

111220101022101 is a deficient number, since it is larger than the sum of its proper divisors (58542478408299).

111220101022101 is a wasteful number, since it uses less digits than its factorization.

111220101022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272178.

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

Adding to 111220101022101 its reverse (101220101022111), we get a palindrome (212440202044212).

The spelling of 111220101022101 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred one million, twenty-two thousand, one hundred one".