120142403021 has 4 divisors (see below), whose sum is σ = 120143124444. Its totient is φ = 120141681600.

The previous prime is 120142402999. The next prime is 120142403041. The reversal of 120142403021 is 120304241021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14087316100 + 106055086921 = 118690^2 + 325661^2 .

It is a cyclic number.

It is not a de Polignac number, because 120142403021 - 2⁶ = 120142402957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120142402984 and 120142403002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120142403041) 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, 30581 + ... + 491141.

It is an arithmetic number, because the mean of its divisors is an integer number (30035781111).

Almost surely, 2^120142403021 is an apocalyptic number.

It is an amenable number.

120142403021 is a deficient number, since it is larger than the sum of its proper divisors (721423).

120142403021 is an equidigital number, since it uses as much as digits as its factorization.

120142403021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721422.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 120142403021 its reverse (120304241021), we get a palindrome (240446644042).

The spelling of 120142403021 in words is "one hundred twenty billion, one hundred forty-two million, four hundred three thousand, twenty-one".