720040044121 has 32 divisors (see below), whose sum is σ = 788870880000. Its totient is φ = 654442094592.

The previous prime is 720040044109. The next prime is 720040044193. The reversal of 720040044121 is 121440040027.

It is a cyclic number.

It is not a de Polignac number, because 720040044121 - 2¹³ = 720040035929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720040042121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52439785 + ... + 52453513.

It is an arithmetic number, because the mean of its divisors is an integer number (24652215000).

Almost surely, 2^720040044121 is an apocalyptic number.

It is an amenable number.

720040044121 is a deficient number, since it is larger than the sum of its proper divisors (68830835879).

720040044121 is a wasteful number, since it uses less digits than its factorization.

720040044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401.

The product of its (nonzero) digits is 1792, while the sum is 25.

Adding to 720040044121 its reverse (121440040027), we get a palindrome (841480084148).

The spelling of 720040044121 in words is "seven hundred twenty billion, forty million, forty-four thousand, one hundred twenty-one".