723213022021 has 12 divisors (see below), whose sum is σ = 841502204832. Its totient is φ = 619739495928.

The previous prime is 723213021991. The next prime is 723213022057. The reversal of 723213022021 is 120220312327.

723213022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 723213022021 - 2²¹ = 723210924869 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 (723213022121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1678395 + ... + 2064808.

It is an arithmetic number, because the mean of its divisors is an integer number (70125183736).

Almost surely, 2^723213022021 is an apocalyptic number.

It is an amenable number.

723213022021 is a deficient number, since it is larger than the sum of its proper divisors (118289182811).

723213022021 is a wasteful number, since it uses less digits than its factorization.

723213022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747160 (or 3747153 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 723213022021 its reverse (120220312327), we get a palindrome (843433334348).

The spelling of 723213022021 in words is "seven hundred twenty-three billion, two hundred thirteen million, twenty-two thousand, twenty-one".