722134221131 has 4 divisors (see below), whose sum is σ = 747035401200. Its totient is φ = 697233041064.

The previous prime is 722134221119. The next prime is 722134221157. The reversal of 722134221131 is 131122431227.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 722134221131 - 2¹⁴ = 722134204747 is a prime.

It is a super-2 number, since 2×722134221131² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 24901180039 = 722134221131 / (7 + 2 + 2 + 1 + 3 + 4 + 2 + 2 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722134221094 and 722134221103.

It is not an unprimeable number, because it can be changed into a prime (722134221161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12450589991 + ... + 12450590048.

It is an arithmetic number, because the mean of its divisors is an integer number (186758850300).

Almost surely, 2^722134221131 is an apocalyptic number.

722134221131 is a deficient number, since it is larger than the sum of its proper divisors (24901180069).

722134221131 is a wasteful number, since it uses less digits than its factorization.

722134221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24901180068.

The product of its digits is 4032, while the sum is 29.

Adding to 722134221131 its reverse (131122431227), we get a palindrome (853256652358).

The spelling of 722134221131 in words is "seven hundred twenty-two billion, one hundred thirty-four million, two hundred twenty-one thousand, one hundred thirty-one".