120331111021 has 4 divisors (see below), whose sum is σ = 131270302944. Its totient is φ = 109391919100.

The previous prime is 120331110997. The next prime is 120331111037. The reversal of 120331111021 is 120111133021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120111133021 = 11 ⋅10919193911.

It is a cyclic number.

It is not a de Polignac number, because 120331111021 - 2⁹ = 120331110509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120331110986 and 120331111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120331111091) 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, 5469595945 + ... + 5469595966.

It is an arithmetic number, because the mean of its divisors is an integer number (32817575736).

Almost surely, 2^120331111021 is an apocalyptic number.

120331111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120331111021 is a deficient number, since it is larger than the sum of its proper divisors (10939191923).

120331111021 is a wasteful number, since it uses less digits than its factorization.

120331111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939191922.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 120331111021 its reverse (120111133021), we get a palindrome (240442244042).

The spelling of 120331111021 in words is "one hundred twenty billion, three hundred thirty-one million, one hundred eleven thousand, twenty-one".