111220121020101 has 4 divisors (see below), whose sum is σ = 148293494693472. Its totient is φ = 74146747346732.

The previous prime is 111220121020081. The next prime is 111220121020117. The reversal of 111220121020101 is 101020121022111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111220121020101 - 2⁹ = 111220121019589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220121020201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18536686836681 + ... + 18536686836686.

It is an arithmetic number, because the mean of its divisors is an integer number (37073373673368).

Almost surely, 2^{111220121020101} is an apocalyptic number.

It is an amenable number.

111220121020101 is a deficient number, since it is larger than the sum of its proper divisors (37073373673371).

111220121020101 is an equidigital number, since it uses as much as digits as its factorization.

111220121020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37073373673370.

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

Adding to 111220121020101 its reverse (101020121022111), we get a palindrome (212240242042212).

The spelling of 111220121020101 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, twenty thousand, one hundred one".