720020612121 has 8 divisors (see below), whose sum is σ = 960510645024. Its totient is φ = 479772160320.

The previous prime is 720020612119. The next prime is 720020612137. The reversal of 720020612121 is 121216020027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720020612121 - 2¹ = 720020612119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720020612091 and 720020612100.

It is not an unprimeable number, because it can be changed into a prime (720020612141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60388320 + ... + 60400241.

It is an arithmetic number, because the mean of its divisors is an integer number (120063830628).

Almost surely, 2^720020612121 is an apocalyptic number.

It is an amenable number.

720020612121 is a deficient number, since it is larger than the sum of its proper divisors (240490032903).

720020612121 is a wasteful number, since it uses less digits than its factorization.

720020612121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120790551.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 720020612121 its reverse (121216020027), we get a palindrome (841236632148).

The spelling of 720020612121 in words is "seven hundred twenty billion, twenty million, six hundred twelve thousand, one hundred twenty-one".