120420420125 has 16 divisors (see below), whose sum is σ = 159124962672. Its totient is φ = 90669491200.

The previous prime is 120420420119. The next prime is 120420420137. The reversal of 120420420125 is 521024024021.

It can be written as a sum of positive squares in 8 ways, for example, as 6377779321 + 114042640804 = 79861^2 + 337702^2 .

It is not a de Polignac number, because 120420420125 - 2¹⁰ = 120420419101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120420420125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28332092 + ... + 28336341.

It is an arithmetic number, because the mean of its divisors is an integer number (9945310167).

Almost surely, 2^120420420125 is an apocalyptic number.

It is an amenable number.

120420420125 is a deficient number, since it is larger than the sum of its proper divisors (38704542547).

120420420125 is an equidigital number, since it uses as much as digits as its factorization.

120420420125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56668465 (or 56668455 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 120420420125 its reverse (521024024021), we get a palindrome (641444444146).

The spelling of 120420420125 in words is "one hundred twenty billion, four hundred twenty million, four hundred twenty thousand, one hundred twenty-five".