120021103131 has 4 divisors (see below), whose sum is σ = 160028137512. Its totient is φ = 80014068752.

The previous prime is 120021103127. The next prime is 120021103133. The reversal of 120021103131 is 131301120021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131301120021 = 3 ⋅43767040007.

It is a cyclic number.

It is not a de Polignac number, because 120021103131 - 2² = 120021103127 is a prime.

It is a super-2 number, since 2×120021103131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120021103131.

It is not an unprimeable number, because it can be changed into a prime (120021103133) 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, 20003517186 + ... + 20003517191.

It is an arithmetic number, because the mean of its divisors is an integer number (40007034378).

Almost surely, 2^120021103131 is an apocalyptic number.

120021103131 is a deficient number, since it is larger than the sum of its proper divisors (40007034381).

120021103131 is an equidigital number, since it uses as much as digits as its factorization.

120021103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40007034380.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 120021103131 its reverse (131301120021), we get a palindrome (251322223152).

The spelling of 120021103131 in words is "one hundred twenty billion, twenty-one million, one hundred three thousand, one hundred thirty-one".