120205343551 has 6 divisors (see below), whose sum is σ = 126864919752. Its totient is φ = 113878746180.

The previous prime is 120205343543. The next prime is 120205343561. The reversal of 120205343551 is 155343502021.

It is not a de Polignac number, because 120205343551 - 2³ = 120205343543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120205343561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166489035 + ... + 166489756.

It is an arithmetic number, because the mean of its divisors is an integer number (21144153292).

Almost surely, 2^120205343551 is an apocalyptic number.

120205343551 is a deficient number, since it is larger than the sum of its proper divisors (6659576201).

120205343551 is an equidigital number, since it uses as much as digits as its factorization.

120205343551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332978829 (or 332978810 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 120205343551 its reverse (155343502021), we get a palindrome (275548845572).

The spelling of 120205343551 in words is "one hundred twenty billion, two hundred five million, three hundred forty-three thousand, five hundred fifty-one".