120011200021 has 4 divisors (see below), whose sum is σ = 120489332544. Its totient is φ = 119533067500.

The previous prime is 120011200013. The next prime is 120011200051. The reversal of 120011200021 is 120002110021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120002110021 = 1493 ⋅80376497.

It is a cyclic number.

It is not a de Polignac number, because 120011200021 - 2³ = 120011200013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120011199980 and 120011200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011200051) 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, 239065885 + ... + 239066386.

It is an arithmetic number, because the mean of its divisors is an integer number (30122333136).

Almost surely, 2^120011200021 is an apocalyptic number.

It is an amenable number.

120011200021 is a deficient number, since it is larger than the sum of its proper divisors (478132523).

120011200021 is an equidigital number, since it uses as much as digits as its factorization.

120011200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478132522.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120011200021 its reverse (120002110021), we get a palindrome (240013310042).

The spelling of 120011200021 in words is "one hundred twenty billion, eleven million, two hundred thousand, twenty-one".