101200110021 has 16 divisors (see below), whose sum is σ = 151979873920. Its totient is φ = 66542536800.

The previous prime is 101200110019. The next prime is 101200110023. The reversal of 101200110021 is 120011002101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101200110019) and next prime (101200110023).

It is not a de Polignac number, because 101200110021 - 2¹ = 101200110019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101200109985 and 101200110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101200110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25670305 + ... + 25674246.

It is an arithmetic number, because the mean of its divisors is an integer number (9498742120).

Almost surely, 2^101200110021 is an apocalyptic number.

It is an amenable number.

101200110021 is a deficient number, since it is larger than the sum of its proper divisors (50779763899).

101200110021 is an equidigital number, since it uses as much as digits as its factorization.

101200110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51344633 (or 51344627 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101200110021 its reverse (120011002101), we get a palindrome (221211112122).

The spelling of 101200110021 in words is "one hundred one billion, two hundred million, one hundred ten thousand, twenty-one".