22001430121 has 6 divisors (see below), whose sum is σ = 24183390266. Its totient is φ = 20001300000.

The previous prime is 22001430079. The next prime is 22001430149. The reversal of 22001430121 is 12103410022.

It can be written as a sum of positive squares in only one way, i.e., 15113260096 + 6888170025 = 122936^2 + 82995^2 .

It is not a de Polignac number, because 22001430121 - 2⁷ = 22001429993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001430095 and 22001430104.

It is not an unprimeable number, because it can be changed into a prime (22001430151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90914880 + ... + 90915121.

Almost surely, 2^22001430121 is an apocalyptic number.

It is an amenable number.

22001430121 is a deficient number, since it is larger than the sum of its proper divisors (2181960145).

22001430121 is a wasteful number, since it uses less digits than its factorization.

22001430121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181830023 (or 181830012 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22001430121 its reverse (12103410022), we get a palindrome (34104840143).

The spelling of 22001430121 in words is "twenty-two billion, one million, four hundred thirty thousand, one hundred twenty-one".