101200021011 has 24 divisors (see below), whose sum is σ = 150372185184. Its totient is φ = 65536732800.

The previous prime is 101200021009. The next prime is 101200021033. The reversal of 101200021011 is 110120002101.

It is a happy number.

It is not a de Polignac number, because 101200021011 - 2¹ = 101200021009 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 101200020984 and 101200021002.

It is not an unprimeable number, because it can be changed into a prime (101200021211) 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 23 ways as a sum of consecutive naturals, for example, 40815 + ... + 451736.

It is an arithmetic number, because the mean of its divisors is an integer number (6265507716).

Almost surely, 2^101200021011 is an apocalyptic number.

101200021011 is a deficient number, since it is larger than the sum of its proper divisors (49172164173).

101200021011 is a wasteful number, since it uses less digits than its factorization.

101200021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493211 (or 493208 counting only the distinct ones).

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

Adding to 101200021011 its reverse (110120002101), we get a palindrome (211320023112).

The spelling of 101200021011 in words is "one hundred one billion, two hundred million, twenty-one thousand, eleven".