720401234421 has 32 divisors (see below), whose sum is σ = 1078482083328. Its totient is φ = 423896639040.

The previous prime is 720401234401. The next prime is 720401234429. The reversal of 720401234421 is 124432104027.

It is not a de Polignac number, because 720401234421 - 2¹⁴ = 720401218037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720401234429) 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, 61495 + ... + 1201908.

It is an arithmetic number, because the mean of its divisors is an integer number (33702565104).

Almost surely, 2^720401234421 is an apocalyptic number.

It is an amenable number.

720401234421 is a deficient number, since it is larger than the sum of its proper divisors (358080848907).

720401234421 is a wasteful number, since it uses less digits than its factorization.

720401234421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263921.

The product of its (nonzero) digits is 10752, while the sum is 30.

Adding to 720401234421 its reverse (124432104027), we get a palindrome (844833338448).

The spelling of 720401234421 in words is "seven hundred twenty billion, four hundred one million, two hundred thirty-four thousand, four hundred twenty-one".